Questions Asked on
November 26, 2012

  1. The Binding Energy of Electrons?

    An X-ray photon of wavelength 0.954 nm strikes a surface. The emitted electron has a kinetic energy of 935 eV. What is the binding energy of the electron in kJ/mol? [KE =1/2 mv^2; 1 electron volt (eV) = 1.602 x 10^- 19 J]

    asked by Amy
  2. math 3rd grade

    How can you use 4x7 to find 8x7? find the product. I don't understand this how can i expect my 3rd grader to understand.

    asked by Sarah
  3. physics

    The block in the drawing has dimensions L0×2L0×3L0,where L0 =0.5 m. The block has a thermal conductivity of 150 J/(s·m·C˚). In drawings A, B, and C, heat is conducted through the block in three different directions; in each case the temperature of the

    asked by Anonymous
  4. trigonometry

    The wheels of a car have radius 11 in. and are rotating at 800 rpm. Find the speed of the car in mi/h. mi/h

    asked by monic
  5. chemistry

    The molar enthalpy of vaporization for water is 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram. b. The molar enthalpy of fusion for water is 6.009 kJ/mol. Express this enthalpy of fusion in joules per gram.

    asked by maryam
  6. physics

    A 1500kg car is approaching the hill shown in the figure at 15.0 m/s when it suddenly runs out of gas. Part A What is the car's speed after coasting down the other side?

    asked by kelly
  7. PHYSICS - PLEASE HELP

    A 9.6 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks along the length of the canoe at 0.53 m/s, relative to the water, and the canoe simultaneously moves in the opposite direction

    asked by Anonymous
  8. Math

    A rocket is launched from ground level with an initial vertical velocity (v0) of 176 ft/s. After how many seconds will the rocket hit the ground? (Hint: h(t) = -16t2 + v0t + h0)

    asked by Erica
  9. trigonometry

    A truck with 48-in.-diameter wheels is traveling at 45 mi/h. (a) Find the angular speed of the wheels in rad/min. rad/min (b) How many revolutions per minute do the wheels make? rev/min

    asked by monic
  10. Chemistry

    It is calculated that 0.0191 moles of CO2 are expected from a reaction at 25 degrees C and 1 atm. What volume of CO2 does this represent in cm3? (R = 0.0821 L atm / K / mol)

    asked by Jack
  11. algebra

    What is a quartic function with only the two real zeroes given? x=-1 and x=-3 Would someone please explain

    asked by lee
  12. Physics

    The tine of a tuning fork, when struck, has an amplitude of 0.13 cm. If the frequency of the fork is 200 Hz, what total distance will the tine travel in 1.0 minute?

    asked by HanuPhys26/11
  13. Physics

    One mole of an ideal gas initially at a temperature of Ti = 7.4°C undergoes an expansion at a constant pressure of 1.00 atm to eight times its original volume. (a) Calculate the new temperature Tf of the gas.______J (b) Calculate the work done on the gas

    asked by Sally
  14. physics

    You are trying to overhear a juicy conversation, but from your distance of 25.0{\rm m} , it sounds like only an average whisper of 25.0{\rm dB} . So you decide to move closer to give the conversation a sound level of 60.0{\rm dB} instead.

    asked by Anonymous
  15. Linear Programming - Math

    An investor has up to $450,000 to invest in two types of investment. Types A pays 6% annually and type B pays 10% annually. To have a well-balanced portfolio, the investor imposes the following conditions. At least one-half of the total portfolios is to be

    asked by Geen
  16. physics

    a 1100 kg wrecking ball hangs from a16m long cable. the ball is pulled back until the cable makes an angle of 17 with the vertical. By how much has the gravitational potential energy of the ball changed?

    asked by kelly
  17. algebra

    I NEED HELP!! The table shows the annual consumption of cheese people in the United States foor selected years in the nineteenth century. What cubic model best fits this data? Year Pounds Consumption 1915 4.156 1922 4.857 1946 7.16 1991 29.989

    asked by kevin
  18. Physics Can you help me get started

    A 24-g ice cube floats in 180 g of water in a 100-g copper cup; all are at a temperature of 0°C. A piece of lead at 92°C is dropped into the cup, and the final equilibrium temperature is 12°C. What is the mass of the lead? (The heat of fusion and

    asked by Amanda
  19. physics

    A cart of mass 223 g is placed on a frictionless horizontal air track. A spring having a spring constant of 10.20 N/ m is attached between the cart and the left end of the track. When in equilibrium, the cart is located 11.0 cm from the left end of the

    asked by Anonymous
  20. Chemistry

    How many moles of oxygen are required for the combustion of 25.5 g of magnesium?

    asked by Kat
  21. physics

    nucleus of oxygen-15 undergoes electron capture. Write out the reaction equation and determine the identity of the daughter nucleus

    asked by tiffany
  22. PHYSICS

    The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. If water at the top of the falls is at 16.7°C, what is the maximum temperature of the water at the bottom of the falls?

    asked by PLEASE HELP
  23. Physics

    A 9.6 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks along the length of the canoe at 0.53 m/s, relative to the water, and the canoe simultaneously moves in the opposite direction

    asked by K
  24. physics/optics

    Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve

    asked by please help
  25. Physics

    A 95.1-g ice cube is initially at 0.0°C. (a) Find the change in entropy of the cube after it melts completely at 0.0°C. Hint: The latent heat of fusion for water is 3.33 105 J/kg. answer in J/kg (b) What is the change in entropy of the environment in

    asked by Sam
  26. stats math

    Suppose you are selling raffle tickets for $3.00 each. You have the following prizes.1 grand prize of $150 1 prize of $75 1 prize of $50 1 prize of $25 5 prizes of $10 each A total of 500 raffle tickets are sold. What is the expected value of each ticket?

    asked by denise
  27. chemistry

    One-third cup of vanilla ice cream provides about 145kcal of energy. A typical adult uses about 195kcal/hr of energy while walking. If all of the enrgy in one third of a cup of valilla ice cream were to be burned off by walking, how many minutes would it

    asked by carol
  28. Geo 7th Grade

    What is NAFTA? a. An agreement between the United States and Mexico to no longer trade. c. An agreement between the United States and Mexico to introduce free trade. b. An agreement between all North American nations to no longer trade. d. An agreement

    asked by rawr... im a dinosaur.... rawr
  29. physics

    Linc, the 65kg lifeguard, slides down a water slide that is inclined at an angle of 35 degrees to the horizontal, into the community swimming pool. If the coefficient of friction of the slide is 0.050, what is Linc's rate of acceleration as he slides down?

    asked by Ben
  30. math

    Is the expression a monomial? explain. qs + 5

    asked by brittany
  31. Physics

    A 9.6 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks along the length of the canoe at 0.53 m/s, relative to the water, and the canoe simultaneously moves in the opposite direction

    asked by K
  32. Microeconomics

    The Burning Belly Taco Stand is considering buying some new special ovens. Each oven will cost $1,000, and will last for 2 years before it wears out. The ovens will be used to make the Taco Stands famous "Burning Ring of Fire" tacos, and will generate a

    asked by Jessica
  33. PHYSICS

    A 5.30-g lead bullet traveling at 390 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in

    asked by please help
  34. physics

    A cart of mass 223 g is placed on a frictionless horizontal air track. A spring having a spring constant of 10.20 N/ m is attached between the cart and the left end of the track. When in equilibrium, the cart is located 11.0 cm from the left end of the

    asked by Anonymous
  35. STATISTICS

    Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of all test takers score at or between 145 and 155, and about 70 percent score at or between 140 and 160. The full range of scores

    asked by MARY
  36. physics

    A cart of mass 223 g is placed on a frictionless horizontal air track. A spring having a spring constant of 10.20 N/ m is attached between the cart and the left end of the track. When in equilibrium, the cart is located 11.0 cm from the left end of the

    asked by Anonymous
  37. Pre-Algebra

    1. 3w – 10w 13w –7w –7 7w 2. y + 2y +3z 2y + 3z 3y + 3z 2y2 + 3z 6yz 3. 6r + r – 5r 2r 1r + r 0r 7r – 5r 4. 5x + 2(x + 6) 7x + 6 7x2 + 12 7x + 12 7x (x + 6) 5. –3m + 3(m + 6) 6 –6m + 6 6m + 18 18

    asked by Jman
  38. Chemisty

    A student following the procedure described in this experiment collected the following data: Mass Mg,g 0.0243 volume of gas mL 25.5 barometric pressure, mm Hg 298 Calculate the value of the gas law constant, R. Please help me work this out, I have no idea.

    asked by Sam
  39. Chemistry

    How many moles of CO2 would be expected to be produced from 0.00639 moles of sodium carbonate?

    asked by John
  40. algebra

    I need someone to check my work not sure if I'm doing this right. The design of a digital box camera maximizes the volume while keeping the sum of the dimensions at 6 inches. If the length must be 1.5 times the height, what should each dimension be? HINT:

    asked by kevin
  41. Physics

    A spaceship of mass 2.3×10^6 kg is cruising at a speed of 6.0×10^6 m/s when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 5.2×10^5 kg, is blown straight backward with a speed of 2.0×10^6 m/s. A second

    asked by K
  42. Physics Please Help ASAP

    Suppose the space shuttle is in orbit 390 km from the Earth's surface, and circles the Earth about once every 92.4 minutes. Find the centripetal acceleration of the space shuttle in its orbit. Express your answer in terms of g, the gravitational

    asked by Sierra
  43. math

    Joseph sold tickets to the school musical. He had 12 bills worth $175 for the ticketssold. If all the money was $5 bills, $10 bills, and $20 bills, how many of each bill did he have?

    asked by Jane
  44. Accounting

    Assume that in Year 1, the ending merchandise inventory is overstated by $30,000. If this is the only error in Years 1 and 2, fill in the items below, indicating which items will be understated, overstated, or correctly stated for Years 1 and 2. Item Year

    asked by Rescueme417
  45. Physics

    A cart on an airtrack is moving at 0.5m/s.when the air is suddenly turned off the cart comes to rest after traveling 1m the experiment repeated but now the cart is moving at 1m/s when turned off .how far does the cart travel the cart travel before coming

    asked by Minte
  46. Physics

    When a driver brakes an automobile, the friction between the brake drums and the brake shoes converts the car's kinetic energy to thermal energy. If a 1750-kg automobile traveling at 28 m/s comes to a halt, how much does the temperature rise in each of the

    asked by please help
  47. English

    Is the gerund being used as a subject, predicate nominative, direct object, or object of the preposition in the following sentences and why? For a crisp texture, avoid overlooking the vegetables. Omar preferred watching the hockey game.

    asked by Kelley
  48. chem

    Zn^2+(aq) + 2OH^-(aq) ----> Zn(OH)2(s) a) how the addition of HCl affects the equilibrium? my answer is it will shift to the right b) how the addition of a small amount of NaOh affects the equilibrium?my answer is it will shift to the left c) how the

    asked by tracy
  49. Chemistry

    Selenium Express your answer in condensed form, in order of increasing orbital energy. For example,[He]2s^22p^2.

    asked by Chironjit
  50. PHYSICS

    Lake Erie contains roughly 4.00 1011 m3 of water. (a) How much energy is required to raise the temperature of that volume of water from 9.0°C to 11.0°C? J (b) How many years would it take to supply this amount of energy by using the 1250-MW exhaust

    asked by PLEASE HELP(DUE SOON)
  51. stats math

    Suppose that two cards are randomly selected from a standard 52-card deck. What is the probability that the first card is a spade and the second card is a space if the sampling is done without replacement?

    asked by denise
  52. physics

    A person with a density of 980 kg/m3 floats in seawater of density 1025 kg/m3. What fraction of the person is submerged?

    asked by nic
  53. Geo 7th Grade

    Mexico City’s population is an example of __________________________. a. the growth of the divide between rich and poor c. the growth of immigration b. the shrinking middle class d. none of the above A?

    asked by rawr... im a dinosaur.... rawr
  54. Math Please Check!!

    Please check my answer to see if I got it right. Thanks. Braden has 1 hour of math homework to do. He spends 2/5 of this time complaining about how much he hates math, 1/3 of the total time looking for his calculator. How much time does Braden actually

    asked by Justin
  55. Chemistry

    Calculate the de Broglie wavelength, in nanometers, associated with a 145 {\rm g} baseball traveling at a speed of 162km/h

    asked by Chironjit
  56. BIOLOGY

    An animal has the genotype Cc for a particular trait. If, through meiosis, a certain female produces 100 eggs, how many of these eggs would have the C gene? & PLEASE HELP &

    asked by Booker Perry
  57. calculus

    if the distance covered by an object in time is given by s(t)=t^2+5t where s(t) is in metersand t is in seconds, what is the distance covered in the interveral between 1 second and 5 seconds?

    asked by Disha
  58. Physics

    A baseball whose mass is 0.25kg is struck by a bat. just before impact, the ball is traveling horizontally ay 40m/s to the left and it leaves the bat at an angle of 30 degrees above the horizontal with a speed of 60m/s. if the ball and bat were in contact

    asked by Rita
  59. math

    Robert has 26 coins that are all nickels and dimes. The value of the coins is $1.85. Write and solve a system of equations thatrepresents this situation.

    asked by Jane
  60. Accounting

    Journalize the following transactions and omit the explanations. A. ABC Corporation purchased $15,000 of office furniture by putting $7,000 down in cash and the rest on account on April 8. B. The corporation paid $60,000 for a two-year lease on April 19.

    asked by Rescueme417
  61. Math

    How many ways can you use pattern blocks to make a parallelogram? Explain.

    asked by Vershawn
  62. probability

    assume the readings on thermometers are normally distributed with a mean of 0 C and a standard deviation of 1.00 C. Find the probability P(-2.08

    asked by jiji
  63. physics

    A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the

    asked by Anonymous
  64. physics

    A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the

    asked by Anonymous
  65. Physics

    A 1.0 102 g piece of copper at a temperature of 460 K and a 2.0 102 g piece of aluminum at a temperature of 2.2 102 K are dropped into an insulated bucket containing 5.0 102 g of water at 280 K. What is the equilibrium temperature of the mixture? (Use the

    asked by Ray
  66. Math

    If Peter picked 240% more plums than Roger and Peter picked 6800 how many did both pick altogether

    asked by Danielle
  67. Real Estate Finance

    A home is valued at $175,000. Property in the area is assessed at 35% of its value, and the local tax rate is $3.85 per $100. What is the amount of annual tax paid on the home?

    asked by tmouery
  68. chem

    Arrange the following oxides in order of increasing acidity: P2O5, As2O5, N2O5, SnO2, SeO3, and BaO. (Use the appropriate symbol to separate substances in the list.)

    asked by Samantha
  69. Physics

    An antitank weapon fires a 3.0 kg rocket which acquires a speed of 50. m/s after traveling 90. cm down a launching tube. Assuming the rocket was accelerated uniformly, what force acted on it?

    asked by Hussen
  70. Agebra 1

    A rental car charges $25.00 per day plus $.30 for every mile the car is driven. Dale rents a car while his own car is being repaired, and he only drives it to and from work each day. Dale drives 7 miles each way to and from work. Write an expression to

    asked by israel oyedapo
  71. algebra

    You are planning an ornamental garden that has a total area of 200 square feet. There are two sizes of ornamental plants you have chosen for your garden. Each small plant requires 2.5 square feet of space and each large plant requires 8 square feet of

    asked by eve
  72. Physics ASAP

    Suppose the space shuttle is in orbit 390 km from the Earth's surface, and circles the Earth about once every 92.4 minutes. Find the centripetal acceleration of the space shuttle in its orbit. Express your answer in terms of g, the gravitational

    asked by Sierra
  73. math calculus

    In an experiment a persons body temperature is given by T=310-(7/9)^n where n is the number of minutes after in an experiment a persons body temperature is given by T=310-(7/9)^n where n is the number of minutes after the start of the experiment and T is

    asked by rima
  74. math

    Could you please show me how to work this problem? Each hand in the human body has 27 bones. There are 6 more bones in the fingers than in the wrist. There are 3 fewer bones in the palm than in the wrist. How many bones are in each part of the hand?

    asked by Jane
  75. BIOLOGY

    An animal has the genotype Cc for a particular trait. If, through meiosis, a certain female produces 100 eggs, how many of these eggs would have the C gene?

    asked by Booker Perry
  76. Geo 7th Grade

    All of the following are concerns about maquiladoras, factories on the United States-Mexico border, except a. they severely lower the GNP of Mexico. b. they negatively impact people’s health. c. they provide tedious work for low pay. d. they create air

    asked by rawr... im a dinosaur.... rawr
  77. probability

    assume the readings on thermometers are normally distributed with a mean of 0 C and a standard deviation of 1.00 C. Find the probability P(-2.08

    asked by jiji
  78. time value

    For the last 19 years, Mary has been depositing $500 in her savings account , which has earned 5% per year, compounded annually and is expected to continue paying that amount. Mary will make one more $500 deposit one year from today. If Mary closes the

    asked by rhonda Porter
  79. algebra

    Adam is 3 times as old as Cynthia and Fred is 16 years younger than adam. One year ago, Adam's age was twice the sum of Cythia and Freds age. Find the present ages. I have a=3c f=a-16 a-1=2(c-1 + f-1) and I don't understand what comes next and why

    asked by Sue
  80. physics

    The free-fall acceleration on Mars is 3.7 m/s2. (b)What length of pendulum would have a 0.9 s period on Mars?

    asked by Anonymous
  81. physics

    The free-fall acceleration on Mars is 3.7 m/s2. (b)What length of pendulum would have a 0.9 s period on Mars?

    asked by Anonymous
  82. Chemistry

    b)Rubidium Express your answer in condensed form, in order of increasing orbital energy. c)Tellurium Express your answer in condensed form, in order of increasing orbital energy. d)Palladium Express your answer in condensed form, in order of increasing

    asked by Chironjit
  83. general

    Topics such as mental health, and career choices are discussed in ............. education. a. lifespan b. consumer c. industrial d. preschool

    asked by kan
  84. physics

    A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f = 0.3 Hz. (a) What is the angular velocity of this system?

    asked by Anonymous
  85. chemistry

    If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?

    asked by marianne
  86. university, physics

    A coffee maker is rated at 1200 W, a toaster at 1100 W, and a waffle maker at 1400 W. The three appliances are connected in parallel to a common 120-V household circuit. (a) What is the current in each appliance when operated independently? (b) What total

    asked by Kenna
  87. math

    If franco is ordering lunch with a drink,sandwich,and a salad.He has the choice of 3 drinks,2 sandwichs,4 salads how many possible lunches are there? Tamara has 4 times as many pages to read for her book report as maria.Tamara has 20 pages left to read.How

    asked by allison
  88. Chemistry

    How many grams of aluminum chloride are produced when 18 g of aluminum are reacted with an excess of hydrochloric acid? 2AL(s) + 6HCl(aq) ---> 2AlCl3(aq) + 3H2(g)

    asked by Student09
  89. biology

    the molecular weight of the protein is about 45 kilodaltons, and the molecular weight of glucose is about 180 daltons. jHow can you estimate the number of molecules of glucose in the 5% solution compared to the number of albumin molecules in its 5%

    asked by bio123
  90. Science 8R - help (please read!!!)

    Homework - Pick 4 out of the 6 forms (types) of energy and gives an example of each from your house. Types/Forms of Energy 1. Mechanical Energy 2. Electrical Energy 3. Electromagnetic Energy 4. Heat Energy 5. Chemical Energy 6. Nuclear Energy I'm picking

    asked by Laruen
  91. physics

    An Alaskan rescue plane traveling 36 m/s drops a package of emergency rations from a height of 162 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s^2 Where does the package strike the ground relative to the point directly below

    asked by Colby
  92. physics

    The spring of the pressure gauge shown in the figure below has a force constant of 1,080 N/m, and the piston has a radius of 1.43 cm. As the gauge is lowered into water, what change in depth causes the piston to move in by 0.750 cm?

    asked by dale
  93. optics

    Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve I have had a look at that website but still struggling

    asked by please help Elena
  94. Geo 7th Grade

    12. A primary reason for the war of independence from Spain was __________. A) pressure from the United States to introduce a democracy B) the unwillingness of Spain to modernize the country C) the unhappiness of the criollos at the privileges reserved

    asked by rawr... im a dinosaur.... rawr
  95. calculus

    The voltage (V) applied to a 0.25 F capacitor is given by the equation : v= (t^2-2t)^3/5t Find the current at t = 3.7 s. (i=C dv/dt) Round to 3 significant figures

    asked by Preet
  96. iMATH!

    Zac moved 1/5 of the things from his old bedroom to his new dorm in 32 1/2 minutes. How long will it take in minutes for him to move all his things to his new dorm room? I need help with the problem I want to know the equation and how to get the answer.

    asked by Unknown
  97. stats math

    Suppose Ray makes 85% of his free throws. What is the probability that Jordan will make 2 free throws in a row?

    asked by denise
  98. math

    write the equation for and graph the parabola. Focus:(-6,7) Opens:Left Contains:(-6,5)

    asked by Keaton
  99. Physics

    n a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. (a) Determine the heat transferred between her body and surroundings during this event. _____J (b) What does the sign of your answer to part (a) indicate?

    asked by Sally
  100. Economics

    Suppose you earned $50,000 last year, and inflation is at 5%. You receive a salary increase of $2,000. Explain your increase salary in nominal and real terms. Did you receive an increase?

    asked by kj
  101. 7th grade Math

    Thom has a scale model of his car. The scale is 1:12. If the actual car has 16-inch wheels, what size are the wheels on the actual scale model?

    asked by Kate
  102. Science

    You are holding the axle of a bicycle wheel with radius 30 cm and mass 1.07 kg. You get the wheel spinning at a rate of 79 rpm and then stop it by pressing the tire against the pavement. You notice that it takes 1.11 s for the wheel to come to a complete

    asked by Gerrard
  103. Math

    Please check my answer to see if I got it right. Braden has 1 hour of math homework to do. He spends 2/5 of this time complaining about how much he hates math, 1/3 of the total time looking for his calculator. How much time does Braden actually work on his

    asked by Justin
  104. chem

    what will happen to bromothymol blue indicator: a.) after addition of HCl, how does it affects the equilibrium b.) after addition of NaOH, hoe does it affect the equilibrium c.) after re-addition of NaOH Rewrite the net equation for the equilibrium? is

    asked by kacey12
  105. chemistry

    List the following bonds in order of increasing ionic character. (Enter your answer in the format H-O for the hydrogen-to-oxygen bond in H2O. Use the appropriate symbol to separate substances in the list.) the barium-to-fluorine bond in Ba-F the

    asked by Shawn
  106. 5th grade Language Arts

    Thanks Ms. Sue! I have other sentences I would like to try to get right. 1. Mr. Morton, the best reading teacher in the world, taught me sentence structure. Complex: Mr. Morton taught me sentence structure = indep & best reading teacher in the world = dep

    asked by Alex
  107. physics ..PLEASE HELP ASSIGN DUE SOON :(

    The sound intensity of 1.2x10-12J/m2s is the threshold of hearing for humans. What is the amplitude of the motion of the air molecules if the speed of sound in the air is 343m/s and the density of air is 1.28kg/m^3? Take the frequency of the air molecules

    asked by joane
  108. physics

    A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f = 1.7 Hz. Block B rests on it, as shown in the figure, and the coefficient of static friction between the two is ìs=0.64. (b) What is

    asked by Anonymous
  109. chemistry

    A sample of oxygen occupies 1.00 L. If the temperature remains constant and the pressure on oxygen is decreased to one-third the orginal pressure, what is the new volume?

    asked by Anonymous
  110. Math

    A gardner plans to build a fence around his 24 by 12 foot rectangular vegetable garden. fencing for the garden can be purchased in 50 foot, 75 foot, or 100 foot rolls. which roll of fencing should the gardner buy

    asked by Tyshaun
  111. Science

    At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 15.3 m, the bottom of the wheel is 3.37 m above the ground and its rim is

    asked by Glenn
  112. English

    1. I think the gymnastics club is more popular than the dancing club. 2. I think the horse racing club is more popular than the archery club. 3. I think the figure skating club is the most popular club in my school. (Are they all grammatical?) 4. I think

    asked by rfvv
  113. Biology

    Should companies that market high-solute beverages be able to say these drinks quench your thirst?

    asked by Ciara Torres
  114. Math

    Under the rules of the United States Golf Association the volume of a golf ball cannot be less than 2.48 cubic inches. A. calculate the radius of this golf ball. B. Calculate the circumference of this golf ball *Please help i don't know how to do this!!*

    asked by Ely
  115. math

    Lena bought a total of 20 postcards. She bought 6 more large poscards than small. Write a system of equations that represents the postcards Lena purchased. Solve the system by substitution. Interpret the solution.

    asked by Jane
  116. math

    Alicia went on a steamboat ride up the Mississippi River. The boat travels 20 miles per hour in still water. How long will it take her to travel 144 miles upstream if the current of the river is 8 miles per hour?

    asked by ashley
  117. chemistry

    If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?

    asked by marianne
  118. physcis

    A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the

    asked by Anonymous
  119. physics

    A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the

    asked by Anonymous
  120. Chemistry

    What is the molality of a solution formed by dissolving 1.95 mol of KCl in 17.0 mol of water (MM of water = 18.02 g/mol), answer in 3 sigfigs?

    asked by Jake
  121. algebra

    a population doubles every month a-initial population 20, what is function that represents poulation with respect to time b-how many present after 1 year and 5 years c-when will there be 10,000

    asked by Steve
  122. gvernemnt

    purpose of a filibuster is to

    asked by candice
  123. Classifyng triangles

    Tell wether the statement is always, so Etimes, or never true. Justify your reasoning and i clude example .The sum of any two angle measures in an acute triangle is greater than 90 degree.

    asked by Andrew
  124. statistics

    the average student sends about 200 text messages a day with the standard deviation of 25 texts.(show graph) a.what is the probability that a student sends more than 250 messsages a day? b.what is the probability that student sends less than 150 text

    asked by Ashley
  125. MATH PLEESE HELP ITS URGENT

    There are 3 gardens below. They are all joined. Garden A and C are are perfect squares. A is 121 m2 and C is 169 m2. What is the area of garden B? Label all the dimensions and then find the perimeter of the entire three gardens that are joined together?

    asked by Spike
  126. physics

    A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.5 N is applied. A 1.1 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin

    asked by Anonymous
  127. chem

    what color change happen when water is added to bromothymol blue indicator: a.) after addition of HCl, how does it affects the equilibrium b.) after addition of NaOH, how does it affect the equilibrium c.) after re-addition of NaOH Rewrite the net equation

    asked by kacey12
  128. Accounting

    . Journalize the following transactions using the perpetual inventory method. Aug. 6 Purchased $830 of inventory on account from Johnston with terms of 2/10, n/30. Aug. 8 Purchased $2,611 of inventory for cash from Pillner Company. Aug.15 Paid for August 6

    asked by Rescueme417
  129. physics

    A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the

    asked by Anonymous
  130. Chemistry

    What is the pH of a 0.350M HBrO Solution? HBrO, Ka=2.3 x 10^-9

    asked by May
  131. Chemistry

    How can I rank these substrates from fastest to slowest reacting? In an SN2 reaction with NaI-Acetone? Based on theory alone? benzyl chloride n-butyl bromide n-butyl chloride sec-butyl chloride tert-butyl chloride

    asked by helllp
  132. geometry

    draw a triangle abc with abc ab =4.5 ,angle abc=35,angle acb=65

    asked by mudit
  133. ALG 2!!!

    6. What is the slope of the line represented by the equation x = -9? 7. Write an equation of a line with a slope of 0 and passing through the point (5,4). Hint: To answer this question, consider the type of line that has a slope of 0. Then write an

    asked by tyneisha
  134. Stats

    In one study of smokers who tried to quit smoking with nicotine patch therapy, 36 were smoking after one year after the treatment, and 34 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who

    asked by Shannon
  135. calculus

    the height in feet of a rocket from ground level is given by the function f(t)= -16t^2+160t. what is the instantaneous velocity of the rocket 3 seconds after it is launched? A 32 feet/sec B 64 feet/sec C 12 feet/sec D 10 feet/sec E 8 feet/sec

    asked by Disha
  136. statistics

    The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25

    asked by Ashley
  137. Chemistry

    Use Planck's equation (E=h \nu) to determine the energy, in kilojoules per mole, of radiation of frequency 4.00×1014s^{-1} .

    asked by Chironjit
  138. math

    If evelyn practices the piano for 45 mins every day, how many minutes does she practice the piano in one year? Please solve. Thx

    asked by stephie 23
  139. Math .-.

    All eighth grade students can choose to take one of the following elective courses: art, chorus, band, or woodworking. There are 2o more students enrolled in chorus than art. Band has 3/4 the enrollment as chorus. woodworking has 5 fewer students than

    asked by Sara
  140. Physics

    When a mass of 28 g is attached to a certain spring, it makes 17 complete vibrations in 3.0 s. What is the spring constant of the spring? Answer in units of N/m

    asked by Kaitlin
  141. trigonometry

    the end of a pendulum of length 40cm travels an arc length of 5 cm as it swings through an angle alpha.find the measure of the central angle

    asked by jophy
  142. physics

    A 66.0 kg rider sitting on a 7.1 kg bike is riding along at 9.4 m/s in the positive direction. The rider drags a foot on the ground and slows down to 6.5 m/s still in the positive direction. What is the change in momentum of the rider and bike?

    asked by Julia
  143. math

    i am a two digit number less than 50. if u put me in groups of 4, there is nothing left. the sum is 7 who am I/

    asked by Anonymous
  144. math

    Find the present value of $31,000 due in 4 yr at the given rate of interest. (a) 6%/year, compounded quarterly $ ? (b) 3%/year, compounded quarterly $ ?

    asked by Amanda
  145. Chem II

    Calculate the pH of 500. mL of 0.100 M acetic acid, CH3COOH, which also contains 0.100 mole of sodium acetate, NaCH3COO. How do you set this up step by step?

    asked by Bianca
  146. Physics

    Billy, whose mass is 55.2kg, is on his way to work after an ice storm when he accidentally slips on a huge patch of ice whose coefficient of sliding friction is 0.032. What force of friction will eventually bring Billy to a stop?

    asked by Kay
  147. physics

    Suppose the roller coaster in Fig. 6-41 (h1 = 34 m, h2 = 10 m, h3 = 30) passes point 1 with a speed of 1.60 m/s. If the average force of friction is equal to one fourth of its weight, with what speed will it reach point 2? The distance traveled is 60.0 m.

    asked by Sarah
  148. Physics

    two equal charges exert an elecrtric force on each other of 0.0385N when positioned 0.15m apart determine the magnitude of the charge on each point.

    asked by Nina
  149. psychology

    Hi I have 2 questions i am searching for the proper answer on and it keep finding conflicting information> 1) Psychologist who believe in ___ are most likely to attempt to understand diversity in ethnic background as an influence on behavior: individual

    asked by jennie
  150. Algebra 1B Chapter 10

    I'm reclassified but I'm still a 10th grader and the only class I need to take is Algebra1B So here's the problem. I'm 1990, the town of Belgrade, Montana, had a popuof of 3422. For each of the next 8 years, the population increased by 4.9% per year. a.

    asked by Asheir
  151. gallegos

    "Robert can swim the first 50 meters of a race in 1 minute. Then he slows down by 12 seconds for each of the next 50 meters of a race. How long will it take Robert to swim a 400-meter race?

    asked by francis
  152. math

    you earn 1o dollars per hour and 20dollars per hour while cleaning houses you need to earn at least 1000 during the summer. write an expression to represent the amount of money earned while babysitting?

    asked by keshawna
  153. chemistry

    If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?

    asked by marianne
  154. chemistry

    the gas contained in a piston is compressed from an original volume of 1.15 L to a new volume of 0.45 L. Assuming that the temperature of the gas remains constant what is the new pressure exerted on the gas if the original pressure was 2.15 atm?

    asked by jen
  155. physics

    nucleus of oxygen-15 undergoes electron capture. Write out the reaction equation and determine the identity of the daughter nucleus

    asked by tiffany
  156. differential calculas

    A rocket fired at 275 m/s at 36o angle of elevation is described by: x= (275cos〖36〗^0 )t and y= (275sin〖36〗^o )t-4.9t^2 Find the velocity (magnitude and direction) at t = 8 s. Round to 1 decimal place.

    asked by Preet
  157. chemistry

    the gas contained in a piston is compressed from an original volume of 1.15 L to a new volume of 0.45 L. Assuming that the temperature of the gas remains constant what is the new pressure exerted on the gas if the original pressure was 2.15 atm?

    asked by jen
  158. math

    A kitchen table has length that is two feet less than twice its width. If a table cloth with an area less that 26 square feet covers the table top, what is the length of the table?

    asked by abe
  159. math

    A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

    asked by Katarzyna
  160. chem101

    The equilibrium under investigation is : H2CO3(aq) * H2O(l) + CO2(g) How does the pulling and pushing of the plunger affects the equilibrium? Is it consistent with LeChatelier's principle? my answer is that if you push you increase the pressure volume

    asked by andrew78
  161. Chemistry

    What electron transition in a hydrogen atom, ending in the orbit 4, will produce light of wavelength 2170 nm ?

    asked by Chironjit
  162. math

    janes math scores were 96 percent 84 percent 92,and 87 percent.what is the average of her score

    asked by Anonymous
  163. calc

    sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle. y = 2x + 1, y = 13 − x^2, x = −1, x = 2

    asked by luca
  164. English

    1. I don't have any comic book in my bag. 2. I don't have any comic books in my bag. (Which one is right, comic book or comic books?) 3. He is the smartest boy in my school. 4. He is the smartest boy in our school. (Are both OK? Which one is right, 'in my

    asked by rfvv
  165. math

    The lifetime of a SuperTough AAA battery is normally distributed with mean of 28.5 hours and standard deviation of 5.3 hours. For a battery selected at random, what is the probability that the lifetime will be 34 hours or less?

    asked by Sav
  166. science

    Carnival mirrors make reflections look very odd. What makes the reflections in these mirrors so strange?

    asked by stephanie
  167. Math

    Sarah is training to be in a long distance bicycle race. If she bicycles at a constant rate of 25 miles per hour how far will she ride in 3 hours? A.8.5 B.25 C.50 D.75 D? Rodney made 20 free throws out of his first 25 attempts. If he continues to throw at

    asked by Jerald
  168. algebra

    convert 8.26 (10)^7 to decimal notation

    asked by cheryl North
  169. math

    Two cards are drawn without replacement from a standard deck of 52 cards. Find the probability a) both cards are red ,b) both cards are the same color, c) the second card is a king given that the first card is a queen, d) the second card is the queen of

    asked by Andrew
  170. math

    write y2-14x-4y-66=0 in standard form. Identify the focus, vertex, axsis of symmetry, and directrix. (This one has me completely stumped good luck)

    asked by Keaton
  171. math

    Given the function f(x)=x^4−6x^2 a.) Find all values of x where local extrema points occur b.)find all values of x where inflection points occur c.) find all local extrema of f(x) d.) find all global extrema of f(x) over the closed interval [-2,3]

    asked by Ryan
  172. math

    Find the amount accumulated future value in the sinking fund if $1,200 is deposited quarterly for 10 years at 6% per year.

    asked by Esther
  173. general

    Literary themes understood by all people regardless of their background or the time they live in are a. universal b. shill-based c. motivational d. literature-based I think "d" bt not sure 100%

    asked by kan
  174. chemistry

    A solution which contains 40.3 g of an unknown molecular compound in 360 g of water freezes at -5.07°C. What is the molar mass of the unknown?

    asked by paul
  175. Physics

    The surface of the Sun is approximately 5,650 K, and the temperature of the Earth's surface is approximately 295 K. What entropy change occurs when 6,000 J of energy is transferred by heat from the Sun to the Earth? ______J/K

    asked by Sally
  176. Spelling 4th grade

    Down is to dive as up is to ____________?

    asked by Caleb
  177. Math

    A decade is 10 years. Which expression gives the number of years in d decades, 10+d, 10d, or d÷10. Explain your choice.

    asked by Gio
  178. Physics

    A gas is compressed at a constant pressure of 0.800 atm from 6.00 L to 1.00 L. In the process, 380 J of energy leaves the gas by heat. (a) What is the work done on the gas? (b) What is the change in its internal energy?

    asked by Sam
  179. algebra

    I need the algebra sentence for the following problem..Adam is 3 times as old as Cynthia and Fred is 16 years younger than Adam. One year ago, Adam's age was twice the sum of Cynthia's and Fred's age.Find their present age.

    asked by Sue
  180. programming

    Develop psuedocode to control operation of vending machine The ACME Company has approached you with a request to develop the psuedocode that will control the operations of their new series of vending machines. The program will be required to maintain the

    asked by Chris
  181. Physics

    When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 60.8-kg man just before contact with the ground has a speed of 5.31 m/s. (a)

    asked by Drue
  182. ALG 2!!!

    9. Write an equation of a line that passes through (9,-5) and (3,-5). Hint: To answer this question, first find the slope using these 2 points. 10. Write an equation of a line that passes through the points (2,3) and (2,-6). Hint: To answer this question,

    asked by tyneisha
  183. English

    This is new to me if someone could please explain how to do this it would be great. Sentence Patterns:draw vertical lines to identify the slot boundaries in the following sentences; label each slot with its form and function. In parentheses at the end of

    asked by Anonymous
  184. gallegos

    "Robert can swim the first 50 meters of a race in 1 minute. Then he slows down by 12 seconds for each of the next 50 meters of a race. How long will it take Robert to swim a 400-meter race?

    asked by francis
  185. math

    A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

    asked by Andrzej
  186. calculus

    The angular displacement in radians is given by: θ=8√(t^2+2) Find the angular velocity and angular acceleration at t = 0.25 s.

    asked by Preet
  187. math

    Mr.Jacobsen wants to hire a magician for his son's birthday party. Marion has a travel fee of $30 and charges $15 per hour. Gregory has a travel fee of$50 and charges $10 per hour. Define a variable. Then write a system of equatins to represent the

    asked by Jane
  188. math

    find first 4 terms of following sequence: a1=-6 abd an=2an-1+3 for n >2

    asked by lisa
  189. math help

    need to completely simplify (10-7)to the 3rd power + 15/3 is it 32? thanks

    asked by Deborah
  190. optics

    Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve

    asked by please help
  191. Hi

     make a table using points along the graphed linear function .Then, determine the correct function.

    asked by Alyson
  192. math word problems

    sal got into an elevator and went down 3 floors then went up 4 floors, then down 5 floors. he was then on the second floor. what floor did he get into the elevator?

    asked by Anonymous
  193. Algebra 2

    A theater has 43 seats in the first row, 47 seats in the second, and 51 seats in the third row. How many seats are there in row 17

    asked by CC
  194. Science

    A car speeds over the top of a hill. If the radius of curvature of the hill at the top is 14.27 m, how fast can the car be traveling and maintain constant contact with the ground?

    asked by John
  195. social studies

    Explain whether the following statement is a fact or an opinion: "Capitalism is a better system of government than communism." Give reasons for your answer.

    asked by Anonymous
  196. Statistics help?

    Hi there, I was looking for any assistance or help on how I would go about starting this assignment? Having difficulty understanding it. Thank you in advance. "A stats instructor is interested in investigating time of day his lectures were held on student'

    asked by Evan
  197. Physics

    An artillery shell is fired at an angle of 75.7 above the horizontal ground with an initial speed of 1720 m/s. The acceleration of gravity is 9.8 m/s^2. Find the total time of flight of the shell,neglecting air resistance. Answer in units of min.

    asked by Karen
  198. math

    write 1.4times 10 to the eighth power in standard notation

    asked by anthony
  199. geography

    Can you check my answers please? 1.What does a circle with a star or dot in its middle usually mean on a map? What name would be next to this symbol in Chile? It usually means the capital of a state or country. This would be Santiago for Chile. 2. In

    asked by Reed
  200. Math

    The ratio of blue to red cars in the parking lot is 3 to 5. If there were 60 red cars how many blue cars would there be? A.50 B.40 C.38 D.36 How do you solve it

    asked by Jerald
  201. algebra

    if 5 times the first number plus 3 times the second number equals 47 and 10 times the first number minus 4 times the second number equals 54, what are the numbers? please explain the steps

    asked by Sue
  202. Physics

    two equal charges exert an elecrtric force on each other of 0.0385 when positioned 0.15 apart determine the magnitude of the charge on each point.

    asked by Excelvia
  203. History

    4. Where do the rights of American citizens come from? from Article I of the Declaration of Independence from Congress from presidential prerogative from the Constitution

    asked by Jman
  204. Real Estate Finance

    If you are required to pay 1.5 discount points, a 1 point origination fee, a 7.5 PMI, and $3,800 for other closing costs and prepaids, how much cash will you need to close the 90% conventional loan on your new $148,500 home? (You have previously deposited

    asked by tmouery
  205. Accounting

    The following information was made available from the income statement and balance sheet of Lauren Company. Item 12/31/10 12/31/09 Accounts Receivable $53,400 58,600 Accounts Payable 35,600 32,700 Merchandise Inventory 85,000 79,000 Sales (2010) 243,000

    asked by Rescueme417
  206. Math

    Prompt. Use equivalent fractions to order therse fractions from least to greatest: 2/3,1/2, 4/12, 5/6. Explain the steps you took to find your answer.

    asked by Susie
  207. general

    The objective that states; "Students will be encouraged to developed attitudes that support the responsible acquisition and application of scientific and technological knowledge to the mutual benefits of self, society, and the environmental" is found in

    asked by kan
  208. general

    Topics such as mental health, and career choices are discussed in ............. education. a. lifespan b. consumer c. industrial d. preschool

    asked by kan
  209. Chemistry

    Hi, I need help with something. What are the correct formulas and names of manganese and oxygen compounds.

    asked by Melo
  210. social studies

    Explain whether the following statement is a fact or an opinion: "Capitalism is a better system of government than communism." Give reasons for your answer.

    asked by Luz
  211. Math

    How would I solve for t if y equals 720 minutes of daylight and t=the number of days in 2012 720 = 713.7+152.7 sin [(2pi/366)(t-80.75)]

    asked by anna
  212. geometry

    Given: ÚA ≅ÚE CF bisects ÚECA Prove: ¢AFB≅ ¢EFD

    asked by BELLE
  213. math

    the ratio of the number of men to the number of woman working at tommys pub is 7:2.altogather there are 360 workers at the company. how many of the workers are woman.

    asked by samantha
  214. physics

    The position of an object connected to a spring varies with time according to the expression x = (6.2 cm) sin (9.1ð t). Find (a) the period of this motion

    asked by Anonymous
  215. algebra

    use f(x)=square root of 5-x and g(x)=x^2 + 2x a-find f(g(x)), state the domain b-find g(f(x)),state the domain c-find g(f(-1)) d-find f(x)/g(x), state the domain, then evaluate for x=3

    asked by Steve
  216. English THE GREAT GATSBY

    1. Fitzgerald creates purpose in Chapter 1. What was his purpose and how does he go about doing it? 7. Write a Gatsby-esque sentence. Make it colorful. My sentence is below... does it make sense? Life to some in New York may seem very Gatsbyesque, what

    asked by Andrea
  217. math

    e/7-3=-5 What does e equal? Please show work!

    asked by t
  218. math

    I work 1 and 1/4 hour per day how many hours do I work per week and for five weeks

    asked by francis
  219. calculus

    what is the value of this limit lim ( (square root x^2+7) +5) x->-3 A 7 B 5 C 3 D 10 E 9

    asked by Disha
  220. statistics

    The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25

    asked by Ashley
  221. Research

    What is the difference between "findings & analysis" in a research paper? Let me know if I'm on the right path or if I'm deluded. I understand that in the findings section is where I will report on what I've discovered in the research. I will cite and show

    asked by Julian
  222. physics

    what is the force per meter on a wire carrying 7.5A current when perpendicular to a 0.70T field?

    asked by franchette
  223. calculus

    Find the instantaneous velocity and acceleration at the given time for the straight-line motion described by the equation: s= (t+2)^4- (t+2)^(-2) at t=1 Round to one decimal place.

    asked by Preet
  224. Economics

    Derive the profit level at this profit maximizing levels of p and q (p = 55) and q = 50. Where the demand curve for a monopoly is p=105-q. Its cost function is C= 100+5q?

    asked by Anthony
  225. CALCULUS

    3rd derivative of (2/x3)+(the sqrt of x-2)/(3x-6)

    asked by JAJA
  226. math

    The number of individuals N in a population of a certain species is given by the following function of time, t: N(t)= 100/(1+9e^-t), t>=0 a.)how many ppl are in the population initially(at t=0) b.)determine the size ofa the populations as tgoes towards

    asked by Ravinder
  227. wilson school

    the flag that nico waves has an odd number in the one place and an even number in the tens place

    asked by tania
  228. physics

    A 500N force is applied to a 25 kg block and accelerates it at 15 m/s^2. What is the force of friction?

    asked by simon
  229. math word problems

    a toy costs $16.50; if you buy 10 you only pay $148. How much money is saved per toy by buying 10 if them.

    asked by Anonymous
  230. MATH

    There are 3 gardens below. They are all joined. Garden A and C are are perfect squares. A is 121 m2 and C is 169 m2. What is the area of garden B? Label all the dimensions and then find the perimeter of the entire three gardens that are joined together?

    asked by Spike
  231. Quantitative Analysis

    43) Twelve randomly-chosen students were asked how many times they had missed class during a certain semester, with this result: 2, 1, 5, 1, 1, 3, 4, 3, 1, 1, 5, 18.

    asked by Anonymous
  232. English

    Why do you use "for" instead of "on" when you are talking about responsibilities? For example, if you wrote "they have these responsibilities for the house" why is it "for" not "on"?

    asked by Lee
  233. physics

    A pendulum has a period of 0.9 s period on Earth. An object is suspended from a spring with force constant 9.8 N/m. (d)Find the mass suspended from this spring that would result in a period of 0.9 s on Earth

    asked by Anonymous
  234. Chemistry

    The following electron configurations correspond to the ground states of certain elements. Name each element. a) [Ar]3d^10 4s^2 4p^4 b) [Ne]3s^2 3p^3 c) [Ar]3d^2 4s^2 d) [Kr]4d^1 5s^2 e) [Xe]4f^13 6s^2

    asked by Chironjit
  235. math

    write a situation with a algebraic exprassion that can reprsened x+3

    asked by john
  236. English

    1. Tom has not to buy a book. 2. Tom doesn't have to buy a book. (Are both the same? Is #1 wrong?)

    asked by rfvv
  237. math

    how do you put three more than a product of a number and 4 is 15 into a problem

    asked by tresi
  238. Factors

    1•How can adding doubles help you to multiply by 2? Give an example. 2•If the ones digit of a number is greater than 1 is 0, what factor or factors must that number have? 3•How to u know that 5 is a multiple of 5?

    asked by Nick
  239. probability

    Chris has a chance of making par on each hole that he plays. Today he plans on playing only four holes. Find probability of each event. A) he makes par on at least one hole. B) he makes par on the first two holes and the fourth hole.

    asked by Katarzyna
  240. math 3

    A fruit farm sells a 10 lb box of navel oranges for $42. If the farm sells 374 of these boxes, how much money will it make? Please solve thx

    asked by stephie 23
  241. math

    Determine all local and global extrema of the function f(x)=x(x−1)

    asked by Matt
  242. Math Help Please

    Kale is building a small basement suite. The bathroom takes up 1/3 of the suite and has an area of 12m2. 1. Draw the room and label all the areas 2. what are the possible dimensions of the bathroom? 3. what is the area of the rest of the suite without the

    asked by Justin
  243. Chemistry

    advantages and disadvantages of municipal waste instead fuel Cannot come up with an answer for this one having trouble please someone help!

    asked by Anonymous
  244. algebra

    A person works 3days @ $2.00 per...day one 5 hrs,day two 6hrs., day three 4hrs

    asked by Anonymous
  245. applied math

    At 1.25 per square foot what is tjh cost of cleaning a rug with dimension 9 ft.3 in.by 6feet 9 in,?

    asked by al
  246. Trigometry

    (2x-1)(x+2)(3x-4)-(4x^2m+7x-2) is simplified to 6x^3+17x^2-25x+10

    asked by Kaithlin
  247. ALG 2!!!

    a) What is the slope of the line through the points (5, 2) and (5, -3)?

    asked by tyneisha
  248. Geometry

    Trapezoid WERI has legs WI and ER. If WERI is isosceles and if m

    asked by Rachel
  249. College International Affairs

    How did the US affect the dissolution of the Soviet Union? What was the US/ Soviet Union relationship at the time period?

    asked by Sophia
  250. science

    Carnival mirrors make reflection look very odd. What market the reflections in these mirrors so strange?

    asked by stephanie
  251. math

    A business is taking alon to buy equipment. the loan is 40,000, set at 4% interest and will be paid off in 12 years. the bank wants to save the business money by calculatine the interst on a Remainin-Balance basis in case he pays it off early The annual

    asked by Susan
  252. math

    Two cards are drawn without replacement from a standard deck of 52 cards. Find the probability a) both cards are red ,b) both cards are the same color, c) the second card is a king given that the first card is a queen, d) the second card is the queen of

    asked by Katarzyna
  253. sfg

    if a car travels a distance of 300km in 4 hours then how much is the distance travelled per hour

    asked by ffch
  254. Physics

    A 1.1 kg block slides along a friction-less surface at 1.4 m/s. A second block, sliding at a faster 4.3 m/s, collides with the first from behind and sticks to it. The final velocity of the combined blocks is 2.6 m/s. What was the mass of the second block?

    asked by K
  255. chemistry

    if a car tire has a pressure of 320 kPa at 25 degrees celsius, what will the pressure be when the tempertature is 55 degrees celsius?

    asked by Cella
  256. Accounting

    Record the following transactions using the accounting equation. Example: Assets = Liabilities + Equity XXXX(cash) XXXX(accounts payable) A. Amanda invests $17,000 cash into her merchandising business. B. She buys $6,500 of office equipment and $3,000 of

    asked by Rescueme417
  257. posibility

    A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

    asked by Katarzyna
  258. calc

    Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle. y = x^3 − 10x, y = 6x

    asked by luca
  259. calc

    find the absolute maximum and minimum for f(x) = x+ sin(x) on the closed interval [0, 2pi]

    asked by chrissy
  260. science

    Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?

    asked by stephanie
  261. Math

    The ratio of the width to the height of most television screens is 4 to 3. If a television screen is 28 inches wide how tall would the screen be? A.12 B.15 C.21 D.25 C? The ratio of girls to boys in Mrs.Hughes classes is 9 to 10. If there are 81 girls in

    asked by Jerald
  262. general

    The objective that states; "Students will be encouraged to developed attitudes that support the responsible acquisition and application of scientific and technological knowledge to the mutual benefits of self, society, and the environmental" is found in

    asked by kan
  263. calc

    f(x) is a polynomial function such that f(-2)=5, f'(-2)=0, and f''(-2)=+3. The point (-2,5) must be an _______ of the graph of f(x) A) relaltive max B) intercept C) point of inflection D) relative min

    asked by chrissy
  264. science

    Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?

    asked by stephanie
  265. chemistry

    how much heat is required to raise the temperature of a 35 gm block of aluminum from 125 to 322 degrees?

    asked by maryam
  266. calculus

    The displacement (cm) of a point is given by s= 〖4t〗^3-3√(1+2t) . Find the instantaneous velocity and acceleration at t = 1.5 sec. Round to 3 significant figures

    asked by Preet
  267. Physics

    Examine the table below as the spearation distance is doubled ow much does the electrostatic forces decrease? 1 20.0 Cm 0.1280N 2 40.0 cm 0.0320N 3 60.0 Cm 0.0142N 4 80.0 CM 0.0080N 5 100.0 CM 0.0051

    asked by Ana
  268. geometry

    can a triangle have sides with the given lengths 4in. 4in. 4in.

    asked by Ashley
  269. Real Estate Finance

    If your lending institution is willing to give you an 85% loan/mortgage on a house valued at $150,000 and you already have given a $5,500 earnest money deposit, how much additional cash will you need for your downpayment?

    asked by tmouery
  270. nuclear biological weapons

    how would you respond to this? the enemy is beginning to manufacture chemical and biological weapons at a factory in the center of a large town

    asked by Anonymous
  271. Accounting

    Prepare a trial balance from the following information for Learn a New Language, Inc. for December 31, 2012. Accounts payable $5,012 Common stock $9,692 Cash $3,928 Notes payable $1,439 Wages expense $777 Marketing expense $493 Equipment $8,345 Accounts

    asked by Rescueme417
  272. Real Estate Finance

    If bank wished to earn $6,300 on a loan over twelve months, what interest rate would the bank have to charge?

    asked by tmouery
  273. science

    What is energy flow? Why is it important? (Use the cow as your example)

    asked by Anonymous
  274. Accounting

    Below is a list of treatments of accounting topics. Place GAAP on the line if the treatment is GAAP-based and place IFRS on the line if the treatment is IFRS-based. A. Interest and dividend income are reported in the investing section of the cash flow

    asked by Rescueme417
  275. Microsoft word,excel

    The insert chart feature does not allow you to do what to a chart?

    asked by Alison
  276. Accounting

    Journalize the following transactions for Tammy Company: Sept. 1 Sold $3,500 of merchandise to Jim on account Oct. 1 Exchanged Jim’s account receivable for a fourmonth, 8% note for $3,500 Dec. 31 Recorded accrued interest on Jim’s note Feb. 1 Jim paid

    asked by Rescueme417
  277. factors

    How do u know that 5 is a multiple of 25?

    asked by Nick
  278. math

    the chip board has 10 black and 13 red chips. what the value shown on the board

    asked by Anonymous
  279. algebra

    convert to decimal notation. 8.26(10)^7

    asked by cheryl North
  280. math

    560.1 divided by 3

    asked by Anonymous
  281. general

    THE WEB SHOW ERROR. DOES NOT GO THROUGH

    asked by kan
  282. math

    how do you do front end estimation

    asked by sadia
  283. Math

    On his way to Florida Jason drove 300 miles in 5 hours If he continues to drive at this rate how far will he drive in the next 4 hours? A.20 B.60 C.150 D.240 D? Kris jogs 17 miles in 3 weeks. If he continues to jog at the same rate how many miles will he

    asked by Jerald
  284. english

    How to write a Solar System poem?

    asked by kina
  285. math

    A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

    asked by Andrew
  286. English

    Tom's popularity index is 30%. The popularity index is 30%. (Are they grammatical?)

    asked by rfvv
  287. math

    write y2-14x-4y-66=0 in standard form. Identify the focus, vertex, axsis of symmetry, and directrix. (This one has me completely stumped good luck)

    asked by Keaton
  288. maths

    scale for actual size 12m,and drawing size 3cm

    asked by Anonymous
  289. chem

    what would happen to the aacuracy and precision of measurements if the mass is measured to a tenth of a gram instead of a thousandth of a gram?

    asked by tracy
  290. Science

    In a hydrate, what source or error would cause the value of x to be lower than its actual value?

    asked by Anonymous
  291. Physics

    A 2.50 kg wheel has a diameter of 20.0 cm and is rotating at 3600 rpm. A force acts on it causing it to come to a rest in 10.0 seconds. What is the magnitude of the force?

    asked by Tom
  292. chem

    If equilibrium favors the right side of the equation, is the value of Keq a realtively large or small number? Breifly explain. pls. help

    asked by Andrew78
  293. statistics

    sing the 95% confidence level and the 11th grade male writing scores in the Class Data file, you would expect the lower end of the confidence interval to be approximately what value?" Answer

    asked by Anonymous
  294. Chemistry Help

    Which direction will the reaction 2NO + O2 2NO2 move if the initial partial pressure of all the species present is 0.50 atm? Show the calculation of Q to support your answer.

    asked by Anonymous
  295. math

    for the equations y=5x+50 and y=6x+25, for how many hats will the cost be the same and what is that cost?

    asked by Michelle
  296. math

    Jack's dad is tiling his shower. On one wall, he will use 9 rows of 14 tiles. The 4 center tiles in the top 2 rows will have a special design on them. How many of the tiles will not have a design of them?

    asked by Mia PLEASEEEE
  297. science

    What is the molar concentration of 25cm3 hydrogen peroxide when potassium permanagate(vii) has a concentration of 0.02 mol/dm3

    asked by lamoy
  298. Math Help Please

    Kale is building a small basement suite. The bathroom takes up 1/3 of the suite and has an area of 12m2. 1. Draw the room and label all the areas 2. what are the possible dimensions of the bathroom? 3. what is the area of the rest of the suite without the

    asked by Justin
  299. science

    what is a gradient

    asked by nina
  300. Math-Probability

    A horse wins 12% of its races on dry tracks, but only 6% of its races on wet tracks. A certain race track is dry 80% of racing days and wet 20% of racing days. a)What is the probability that, on a random day the track is wet and the horse wins? b) What is

    asked by cd
  301. math, trigonometry, physics

    Before a tidal wave the sea level usually drops first leaving the seabed exposed. (normally about 30 feet below sea level) then it rises an equal distance above sea level. Waves hitting a city with a maximum height of 38.9 meters. The cycle of rise and

    asked by kang
  302. Physics

    The period of A soundwave emitted by a vibrating guitar string is 3.0*10^-3s. If the speed of the soundwave is 360 m/s, what is its wavelenth?

    asked by HanuPhys26/11
  303. math, trigonometry, physics

    Before a tidal wave the sea level usually drops first leaving the seabed exposed. (normally about 30 feet below sea level) then it rises an equal distance above sea level. Waves hitting a city with a maximum height of 38.9 meters. The cycle of rise and

    asked by kang
  304. math

    what is the prime factorization of 1050

    asked by fgtr
  305. Geo 7th Grade

    What would you say is the biggest influence on Mexico's economy?

    asked by rawr... im a dinosaur.... rawr
  306. algebra

    Light intensity of water equation log I/12=-0.0125 What depth will the light intensity be half that of surface?

    asked by Steve
  307. Simmons

    How is guilt a powerful force in human life

    asked by Kathy
  308. math

    If the key to Graceland costs $750 today and appreciates in value by 15% in one year, what will it be worth one year from today?

    asked by Lisa
  309. Math

    Please check my answers and if there are any other possibilities then please tell me. List all the factors for 45: I got 1x45, 3x15 and 9x5. are there anymore?

    asked by Justin
  310. Simmons

    How is guilt a powerful force in human life

    asked by Kathy
  311. Itroduction to finance

    Anaswer all questions You have been commissioned to analyse the financial statements of MILOPA LIMITED. Below are the Consolidated statement of financial position and the Statement of Comprehensive Income of the companies. STATEMENTS OF FINANCIAL POSITION

    asked by ahdab
  312. chemistry

    _Calculating_Quantities_in_Reactions_ 1) _Blank_ in chemical equations provide mole ratios that can be used as conversion factors. 2) When calculating the numbers of particals,you can use _Blank_ as the conversion factor. 3)In making calculations involving

    asked by Student09
  313. math

    2x squared plus 6 x plus 3 is equal to 0.....

    asked by janet
  314. English

    1. Sea horses move only for 2 meters an hour. 2. Sea horses move for only for 2 meters an hour. (Are both OK? In #1, is 'for' missing before 'only'?)

    asked by rfvv
  315. Programming

    Describe a programming project or situation in the workplace that would lend itself to one-dimensional array usage.

    asked by Nyeel
  316. Chemisty

    how many mole of calcium sulfate are in a 100mL of .86M solution?

    asked by Riley
  317. CAN ANYONE HELP !MATH

    Kale is building a small basement suite. The bathroom takes up 1/3 of the suite and has an area of 12m2. 1. Draw the room and label all the areas 3. what is the area of the rest of the suite without the bathroom? 4.what is the perimeter of the basement

    asked by Justin
  318. algebra

    find the real solution of the equation by graphing 6x^3-2x=-9x^2 i got 0.2,-1.7 is this correct

    asked by lee
  319. MATH URGENT

    A submarine was floating on the water. It went under the water at a rate of 0.5m/second for 3 minutes. It then started to rise towards the surface at a rate of 0.7m/second for 1.5 minutes. What is the depth of the submarine? The hint my teacher gave me

    asked by Spike
  320. calculus

    What is the value of this limit? lim (x^2+4/^2-3x+1) x->4 A. 1 B. 4 C. 5 D -oo E. oo

    asked by Disha
  321. pre calc

    What is the left-hand limit of f(x) = |x-3|/x-3 as x approaches 3? A.1 B.2 C.0 D.-1 E.-2

    asked by rima
  322. college algbra

    find the domain f(x)=x/x-8,g(x)=-7/x solve the following exponential equation equation exact answers only 3e x-1 = 2+e^x-1

    asked by zach w
  323. math calculus

    what does this function show at x=5? f(x)=^2-25/x-5 A. removable discountinuity B. jump discountinuity C. infinite discountinuity D. Countinuity E. None of the above

    asked by Disha
  324. math

    A ship sail S 40 degrees W for 4 hours at 30 kph. make a scale drawing

    asked by Maddie
  325. Statistics

    All else equal will the confidence intervals for samples of size 80 be longer or shorter than those for sample of size 40?

    asked by Emily
  326. math question

    What is 3/4 + 1/3? Please explain

    asked by Anonymous
  327. math

    Two cards are drawn without replacement from a standard deck of 52 cards. Find the probability a) both cards are red ,b) both cards are the same color, c) the second card is a king given that the first card is a queen, d) the second card is the queen of

    asked by Andrzej
  328. MATH

    A submarine was floating on the water. It went under the water at a rate of 0.5m/second for 3 minutes. It then started to rise towards the surface at a rate of 0.7m/second for 1.5 minutes. What is the depth of the submarine?

    asked by Spike
  329. Physics

    In each cycle of its operation, a heat engine expels 6,100 J of energy and performs 1,300 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle? (J) (b) Find the thermal efficiency of the engine. (%)

    asked by Sam
  330. Physics

    A Carnot engine operates between 170°C and 23°C. How much ice can the engine melt from its exhaust after it has done 4.5 104 J of work? (kg)

    asked by Sam
  331. Physics

    When an inflated baloon is been put in the freezer for 15 minutes, which of the ideal gas law is the observation

    asked by Shaibu
  332. physics

    12. The ratio of the tensile (or compressive) strength to the density of a material is a measure of how strong the material is “pound for pound.” (a) Compare tendon (tensile strength 80.0 MPa, density 1100 kg/m3) with steel (tensile strength 0.50 GPa,

    asked by mary
  333. Physics

    The surface of the Sun is approximately 5,650 K, and the temperature of the Earth's surface is approximately 295 K. What entropy change occurs when 6,000 J of energy is transferred by heat from the Sun to the Earth? (J/K)

    asked by Sam
  334. Physics

    Suppose the ruler in procedure 3 is asymmetrical, balancing at the 60.2 cm mark. The ruler is now supported at the 41.3 cm mark, and a mass of 364 g is placed at the 26.2 cm mark. Find the mass of the ruler. T=rF

    asked by Anwar
  335. math (calculus)

    A line segment has one endpoint, A, on the x-axis and the other endpoint, B, on the y-axis. It passes through the point (1,2). If O is the point (0,0), for what value of angle OAB is the length of the line segment AB a minimum? What is the minimum length?

    asked by Garry
  336. physics

    if the masses remain the same ,but the separation is decreased to one-half of the original distance . what happens to the gravitation force?

    asked by mary grace
  337. physics

    What length of pendulum has a period of 0.9 s on Earth?

    asked by Anonymous
  338. Math

    Which fraction is greatest. 5/6 7/9 2/3or9/12

    asked by Anonymous
  339. physics

    A puck of mass 4 kg is attached to a spring of force constant 100 N/m and natural length 0.07 meters. The other end of the spring is attached to a fixed pivot. The puck is set into circular motion so that the spring is stretched 0.03 meters from its

    asked by rebecca
  340. physics

    During winter break, the police department in your hometown asks you to consult in the investigation of a traffic accident that occurred in a large parking lot. It seems that a car was backing out of a parking space when a pickup truck plowed straight into

    asked by Alec
  341. math

    the lengths of two legs of a right triangle depend on time. One, whose length is x increase at the rate of 5 feet per second, while the other, of length y, decreases at the rate of 6 feet per second. At what rate is the hypotenuse changing when x=3 and

    asked by Aaron
  342. statistics

    The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes, what is the probability that a diver stays under for more than 36 minutes

    asked by Ashley
  343. English

    What is the pronoun in the sentence, He is called Spider?

    asked by Anonymous
  344. social studies

    I need help on these questions: 1. _____________ was the first permanent ______________ settlement in the ________________. 2. The ____________ went to war with the settlers because they wanted to keep the land for ____________ and ______________.

    asked by Celest
  345. science

    a glass contains 200cm3 what is the mass in the glass

    asked by donnie smith
  346. calculus

    what is the slope of the tangent line passing through the point (2,3) of the graph of this function? f(x)=x^2+2x-5 A 1 B 2 C 3 D 4 E 6

    asked by Disha
  347. differential calculas

    Find the instantaneous velocity and acceleration at the given time for the straight-line motion described by the equation: s= (t+2)^4- (t+2)^(-2) at t=1 Round to one decimal place.

    asked by Preet
  348. differential calculas

    A point moves along the curve that has the parametric equations: x=9t^3- 〖6t〗^2 and y= 〖9t〗^3+27 x and y being in yards and t being in minutes. Find the magnitude and direction of the acceleration when t= 5/2. Round answers to 3 significant

    asked by Preet
  349. 5th grade Language Arts

    I need help classifying sentences (compound, complex, compound-complex). Here's the sentence: I got in trouble so I can't go to the party, but it would have been fun. I answered it was complex which I got wrong.

    asked by Alex
  350. physics

    nucleus of oxygen-15 undergoes electron capture. Write out the reaction equation and determine the identity of the daughter nucleus

    asked by tiffany
  351. differential calculas

    The angular displacement in radians is given by: θ=8√(t^2+2) Find the angular velocity and angular acceleration at t = 0.25 s

    asked by Preet
  352. English

    I need to do a research paper. The assisgnment is research Christmas back to its ancient origins. Can you recommend some sites I can look into?

    asked by Vicky
  353. Math

    -6(7x-1)

    asked by Kayla
  354. calculus

    A point moves along the curve that has the parametric equations: x=9t^3- 〖6t〗^2 and y= 〖9t〗^3+27 x and y being in yards and t being in minutes. Find the magnitude and direction of the acceleration when t= 5/2. Round answers to 3 significant

    asked by Preet
  355. chemistry

    What is the final daughter nuclide for 131I ? How is it determined?

    asked by What?
  356. Algebra 2 ..

    Simplify. 4i ( What are the rules for simplifying these imaginary numbers?)

    asked by Anonymous
  357. statistics

    The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25

    asked by Ashley
  358. calculus

    A rocket fired at 275 m/s at 36o angle of elevation is described by: x= (275cos〖36〗^0 )t and y= (275sin〖36〗^o )t-4.9t^2 Find the velocity (magnitude and direction) at t = 8 s. Round to 1 decimal place.

    asked by Preet
  359. Health

    I have a swollen lymph node under the jaw for nearly eight months. What are the causes?

    asked by Anonymous
  360. physics

    What length of pendulum has a period of 0.9 s on Earth?

    asked by Anonymous
  361. math

    Two cards are drawn without replacement from a standard deck of 52 cards. Find the probability a) both cards are red ,b) both cards are the same color, c) the second card is a king given that the first card is a queen, d) the second card is the queen of

    asked by Andrew
  362. math

    Convert the following credit card rate to the APR. Nebraska, 0.04110% daily rate. (Round your answer to the nearest whole number.)

    asked by louis
  363. 5th grade math

    the press was invented about 1450 and had little change for 350 years. since then many changes have been made. how many decades have changes been occurring?

    asked by Anonymous
  364. chemistry

    A beaker containing salt solution and thistle with water sealed at its end with a semi permeable membrane, qhat gappend when the apparatus is assembled?

    asked by kerrista moore