Questions Asked on
November 18, 2012

  1. trig

    It is 4.7km from Lighthouse A to Port B. The bearing of the port from the lighthouse is N73E. A ship has sailed due west from the port and its bearing from the lighthouse is N31E. How far has the ship sailed from the port?

    asked by Ashley
  2. Chemistry

    Calculate the energy change associated with the transition of an electron from the n=2 shell to the n=5 shell in a Bohr hydrogen atom.

    asked by Daniel
  3. chemistry

    explain the following observations; A. an open can of soda loses its fizz quicker at room temperature than in the frig. B. chlorine gas in tap water escapes as the water warms to room temperature. C. less sugar dissolves in iced coffee than in hot coffee.

    asked by Boo Boo
  4. english

    Has anyone read Kate Chopin is so could you check my answers? 1. When Mrs. Sommers leaves to go shopping, she forgets to take money. her daughter Mag’s size. her preferred store. to eat lunch.***** 2. The resolution of a story should build to the climax

    asked by lee
  5. Math

    neha scored 75% in science,95% in maths and 70% in english. If the max. marks in these subjects were 80,100and 70,respectively. find her aggregate percentage.

    asked by Simran kaur
  6. algebra

    What are the zeros of the function? what are their multiplicities f(x)=4x^3-20x^2+24x numbers -3,-2,and 0 are multiplicity of 1 numbers 3,2,and 0 are multiplicity of 1

    asked by lee
  7. Chemistry

    Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated? pls help me I stayed up all last night trying to get this one question :(

    asked by Kevin pls it's due at midnight :(
  8. Chemistry Math

    A 0.4671g sample containing sodium bicarbonate was titrated with HCL requiring 40.72ml. The acid was standardized by titrating 0.1876g of sodium carbonate FW 106mg/mmol requiring 37.86ml of the acid. Find the percentage of NAHO3 FW 84mg/mmol in the sample

    asked by Fai
  9. physics

    Truck suspensions often have "helper springs" that engage at high loads. One such arrangement is a leaf spring with a helper coil spring mounted on the axle, as in Figure P7.17. The helper spring engages when the main leaf spring is compressed by distance

    asked by Emily Tran
  10. physics

    A block of mass 0.78kg starts from rest at point A and slides down a frictionless hill of height h. At the bottom of the hill it slides across a horizontal piece of track where the coefficient of kinetic friction is 0.29. This section (from points B to C)

    asked by shyne1
  11. Chemistry

    Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction. 2 NaN3(s)--> 2 Na(s) + 3 N2(g) What

    asked by Matthew
  12. physics

    A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of 2.80 m/s. The coefficient of kinetic friction between sled and ice is 0.150. Use energy considerations to find the distance the sled moves before it stops.

    asked by Emily Tran
  13. physics

    the distance between a loudspeaker and the left ear of a listener is 2.70 m a) calculate the time required for sound to travel this distance if the air temperature is 20oC. b) assuming that the sound frequency is 523 Hz, how many wavelengths of sound are

    asked by Joe
  14. English

    What the story " The Wedding Gift" by Thomas H Raddall makes use of symbolism in the following questions: a) Explain what the snow represents b) Explain what the character's tracks through the snow represent.

    asked by hanuEng
  15. CAPA

    Na+ and Se2-

    asked by MARIAN
  16. Physics

    A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. One object is a 200 g cube of copper that is initially at 85°C, and the other is a chunk of aluminum that is initially at 5°C. To the surprise of the

    asked by R
  17. chemistry

    Nitrogen dioxide (NO2) cannot be obtained in a pure form in the gas phase because it exists as a mixture of NO2 and N2O4. At 23°C and 0.94 atm, the density of this gas mixture is 2.6 g/L. What is the partial pressure of each gas? NO2 N2O4

    asked by Kailee
  18. Chemistry

    What mass of Uranium (in mg) is contained in 1ml of 4.55M (UO2)3(PO4)3 solution? How do I solve this? *all numbers are subscripts

    asked by Michelle
  19. Trig

    Suppose you would like to cross a 200-foot wide river in a boat. Assume that the boat can travel 35 mph relative to the water and that the current is flowing west at the rate of 5 mph. What bearing should be chosen so that the boat will land at a point

    asked by Adam
  20. chemistry

    A solution containing 80g of NaNO3 in 75g of H2O at 50 degrees celsius is cooled to 20 degrees celsius, how many grams of solid NaCO3 crystallized after cooling?

    asked by Boo Boo
  21. physics

    From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequency that is 0.86 times as small as that emitted by the car when it is stationary. The speed of sound is 343 m/s. what is the

    asked by Joe
  22. physics

    A shell is fired from the ground with an initial speed of 1.58 103 m/s at an initial angle of 31° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. m (b) Find the amount of time the shell is in motion. s

    asked by mel
  23. Algebra 2

    Can you double check my answer The lengths of the sides of a rectangular window have the ratio 1.6 to 1. The area of the window is 2,560 square inches. What are the dimensions of the window? (1 point) 50.6 inches by 50.6 inches 40 inches by 64 inches 40

    asked by Robert
  24. physics

    A meterstick (L = 1 m) has a mass of m = 0.174 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark.

    asked by ali
  25. Physics

    The density of the Earth, at any distance r from its center, is approximately (14.2-11.6(r/R)*10^3) Kg/m^3, where R is the radius of the Earth. Show that this density leads to a moment of inertia I = 0.330MR2 about an axis through the center, where M is

    asked by Avery
  26. Physics

    A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to another circular orbit with a period of 180 min? (Earth: radius = 6.4  106 m, mass = 6.0  1024 kg)

    asked by Annie
  27. physics

    You throw a ball downward from a window at a speed of 2.0m/s. The ball accelerates at 9.8m/s^2. How fast is it moving when it hits the sidewalk 2.5m below?

    asked by Skylar
  28. Trig

    Suppose you would like to cross a 209-foot wide river in a boat. Assume that the boat can travel 32 mph relative to the water and that the current is flowing west at the rate of 6 mph. If the bearing chosen is chosen so that the boat will land at a point

    asked by Adam
  29. Physics

    A hockey goalie is standing on ice. Another player fires a puck (m = 0.22 kg) at the goalie with a velocity of +63 m/s (a) If the goalie catches the puck with his glove in a time of 7.0 10-3 s, what is the average force (magnitude and direction) exerted on

    asked by Anonymous
  30. Chemistry

    (a)What is the bond order of the diatomic molecule BN? (b) Is BN paramagnetic? (c) Rank the following compounds in order of increasing bond energy: B2, N2, BN. (d) Rank the following compounds in order of increasing bond length: B2, N2, BN.

    asked by b
  31. chemistry... HELP !!!!!!!

    The average bond enthalpy for C__H is 413 kJ/mol. In other words, 413 kJ of energy is required to break a mole of CH into atoms: CH (g) ----> C(g) + H(g) delta H= 413 kJ Using this information, and enthalpy of C6H6=5535kJ, calculate the enthalpy change of

    asked by sarah
  32. math

    a bag of marbles can be divided evenly among two, three, or four friends. a) how many marbles might be in the bag b) what is the least number of marbles that can be in the bag? c) how many would there be if there are between 30 an 40 marbles in the bag?

    asked by jha
  33. physics

    light is an electromagnetic wave and travels at a speed of 3.00 x 108 m/s. the human eye is most sensitive to yellow-green light which has a wavelength of 5.45 x 10-7 m. what is the frequency of this light?

    asked by Joe
  34. Physics

    A baseball (m = 135 g) approaches a bat horizontally at a speed of 40.4 m/s (90 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the ball by

    asked by D
  35. Chemistry

    If water is added to magnesium nitride, ammonia gas is produced when the mixture is heated. Mg3N2(s) + 3 H2O(l) => 3 MgO(s) + 2 NH3(g) If 11.1 g of magnesium nitride is treated with water, what volume of ammonia gas would be collected at 23°C and 739 mm

    asked by sam
  36. Chemistry

    Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

    asked by Kervin
  37. Science

    as you push a lawn mower , the horizontal force is 300n, if you push the mower a distance of 500m, how much work do you do?

    asked by Madison
  38. Physic

    A father pushes horizontally on his daughter's sled to move it up a snowy incline, as illustrated in the figure, with h = 3.7 m and θ = 18°. The total mass of the sled and the girl is 35 kg and the coefficient of kinetic friction between the sled runners

    asked by Thanh
  39. Chemistry

    Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

    asked by Kervin
  40. math-5

    Which choice is the answer? Show me please. Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a.

    asked by Anonymous
  41. English

    I have written my answers as following. Please improve my answers if needed: The story "The Wedding Gift" by Thomas Raddall makes use of symbolism. A) Explain what the snow represents. The snow in the short story is the representation of the hope and

    asked by hanuEng
  42. Physics

    A circular disk of radius 30 cm is rotating with an angular velocity of 2 radians / s. What is the tangential velocity of a point on the rim of the disk? What is its centripetal acceleration?

    asked by Bryan
  43. Chemistry

    Devise a test to distinguish between Cu2+ and Co2+.

    asked by Bella
  44. math-5

    Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a. multiply 1/8 by 3 b. multiply 1/2 by 3 c.

    asked by Anonymous
  45. physics

    A daredevil plans to bungee jump from a balloon 53.0 m above a carnival midway. He will use a uniform elastic cord, tied to a harness around his body, to stop his fall at a point 10.0 m above the ground. Model his body as a particle and the cord as having

    asked by Emily Tran
  46. physic

    Suppose you and a friend, each of mass 65 , go to the park and get on a 4.5 -diameter merry-go-round. You stand on the outside edge of the merry-go-round, while your friend pushes so that it rotates once every 5.0 seconds. What is the magnitude of the

    asked by win
  47. physics

    a longitudinal wave with a frequency of 3.0 Hz takes 1.7 s to travel the length of a 2.5-m slinky (see figure 16.3). Determine the wavelength of the wave.

    asked by Joe
  48. Math

    8) A consumer groups tries to determine the most expensive items in a convenience store. Four items are purchased in the convenience store and compared to the average price in stores in the area. Assume tat the price distribution is normal. Use your

    asked by Kay
  49. Chemistry

    Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

    asked by Kevin
  50. physics

    A crate with a mass of 110 kg glides through a space station with a speed of 2 m/s. An astronaut speeds it up by pushing on it from behind with a force of 240 N, continually pushing with this force through a distance of 4 m. The astronaut moves around to

    asked by Emily Tran
  51. statistics

    A survey of adults found that 35% say that their favorite sport is professional football. You randomly select 120 adults and ask them if their favorite sport is professional football. Find the probability that more than 30 people answer yes.

    asked by Erica
  52. helath help

    11. Fats help maintain your cell membranes. (1 point)True False 12. Your body does not use energy when you sleep. (1 point)True False 13. People with anorexia nervosa eat large amounts of food and then purge. (1 point)True False 14. Your body image is the

    asked by tesj
  53. physics

    at a distance of 3.8 m from a siren, the sound intensity is 3.6 x 10-2 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.

    asked by Joe
  54. math

    Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Estimate the total time she spent on her math and science homework?

    asked by Anonymous
  55. penketh high

    Laughing Gas, N2O, is made by the careful decomposition of ammonium nitrate NH4NO3 (s) = N20 (g) + 2H20 (g) How many grams of N2O can you obtain? How many dm3 of stream would also be produced?

    asked by christy
  56. Chemistry :'(

    (d) Which of the following sets of quantum numbers is not permitted? Select all that apply. 2,1,1,-1/2 1,1,0,-1/2 2,-1,1,-1/2 3,2,1,1/2 Pls pls pls help me :( x

    asked by Anonymous
  57. Finance

    Teddy Company paid a $3.50 dividend this year (D0 = $3.50). Next year the company expects to pay a $4.00 dividend (D1 = $4.00). The stock's dividend is expected to grow at a rate of 15 percent a year until three years from now (t = 3). After this time, the

    asked by Pam
  58. algebra

    An investor invested a total of $2,600 in two mutual funds. One fund earned a 5% profit while the other earned a 3% profit. If the investor's total profit was $98, how much was invested in each mutual fund? The amount invested in the mutual fund that

    asked by Samantha
  59. Physics

    Use the following numbers for this question. MEarth 5.98e+24 kg MJupiter 1.9e+27 kg MSun 2e+30 kg Earth-Sun distance 150000000000 m Jupiter-Sun distance 778000000000 m rE 6380000 m rJ 69000000 m G = 6.67e-11 Nm2kg-2 the acceleration due to gravity at the

    asked by Anonymous
  60. statistics

    2. An investigator wants to estimate caffeine consumption in high school students. How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95%

    asked by bobbie ann johansen
  61. physics

    A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 0.955 m (3.13 ft) by the time it reaches home plate 18.3 m (60 ft) away. How fast was the pitcher's pitch?

    asked by mel
  62. algebra

    what are the real or imaginary solutios of the polynomial equation x^3-8=0 I came up with 1+i sgrt 3 and 1-i sgrt 3 could some see if I'm right

    asked by lee
  63. Markov chains

    A company has 2 machines. On any day, each machine that is working has a 1/3 chance of breaking down. If a machine breaks down during the day, it is sent to a repair facility and will be working 2 days after it breaks down. Letting the state of the system

    asked by Denise
  64. Physics

    A pond with a flat bottom has a surface area of 820 m^2 and a depth of 2.0m. on a warm day, the surface water is a temperature of 25 deg C, while the bottom of the pond is at 12 deg C. Find the rate at which energy is transferred by conduction from the

    asked by R
  65. Math

    Given a trapezoid ABCD with AD parallel to BC. The diagonals AC and BD are congruent. Prove that ABCD is an isosceles trapezoid.

    asked by Yuki
  66. organic chemistry

    What is the major product of the nitration reaction of 2-methylacetanilide? Why is it the major product?

    asked by nikki
  67. pre algebra

    Your school is selling tickets for a band concert to raise money for a new gym. a. Each ticket costs $3.50. Write a variable expression for the money raised by selling t tickets. b. The band needs to use some of the money raised to pay for their new

    asked by genny
  68. Human Resources

    Can you think of any cultural problems U.S. hospitals might encounter as a result of recruiting nurses abroad?

    asked by Joyce
  69. pre calculus

    A wire 10m long is cut into 2 pieces. one piece will be cut into a square the other piece will be shaped into a circle. Graph A= A(x) for what value of x is A smallest?

    asked by ann9012
  70. Math

    Can you please help me with this? Convert 36.7 lbs/in(3) to kilograms per cm(3). (There are 14.59 kilograms in 32.174 pounds and 61.02 in(3) in 1000 cm(3)). Thanks!

    asked by Erin
  71. Chemistry

    Rank the following 3 atoms in terms of increasing average valence electron energy (AVEE): Rb, Cl, Se... Pls try and help me :( x

    asked by Anonymous
  72. Chemistry

    Devise a test to distinguish between Cu2+ and Co2+.

    asked by Bella
  73. Chemistry

    For each of the four pairs of compounds, which would you expect to have the higher melting point based on the operative bonding mechanism? NaCl and KBr HF and CF4 CF4 and CHI3 H2 and Br2 Pls try and help me :( xX

    asked by Anonymous
  74. math-5

    Tara spent 3 hours doing homework. She spent 1/3 of her time on math and 1/5 of her time on science. What is the total time Tara spent on her math and science homework?

    asked by Anonymous
  75. Physics

    A crate with a mass of 110 kg glides through a space station with a speed of 2 m/s. An astronaut speeds it up by pushing on it from behind with a force of 240 N, continually pushing with this force through a distance of 4 m. The astronaut moves around to

    asked by Emily Tran
  76. physics

    a 65kg oak trunk is placed on a board, inclined at an angle of 30 with the horizontal. What is the weight? The Normal Force of the trunk? The Applied force down the ramp?

    asked by Liam
  77. Health 8R help!!!!!!!!! (please read!)

    Dear Abby: Marijuana Dear Abby, I am very concerned about my friend Sue. She told me that she smoked weed with her older brother. First of all, what is weed? Is it legal? What are the effects? What should I do if she asks me to try it with her? I am very

    asked by Laruen
  78. physics

    Suppose the sound is emitted uniformly in all directions by a public address system. The intensity at a location 22 m away from the sound source is 3.0 x 10-4 W/m2. What is the intensity at a spot that is 78 m away?

    asked by Joe
  79. Physics

    A 40,000 kg railroad car initially traveling at 10 m/s collides in elastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

    asked by Bryan
  80. Math

    Find the mean. median and mode(s) of the data. (DONE) Choose the measure that best represents the data. Explain your reasoning. (WHAT?!?) 1. Mean: 28.5 Median: 33.5 Mode: 35 2. Mean:37 Median:43 Mode:No mode

    asked by Mathmatic
  81. algebra

    Find the cost of a home in 20 years, assuming an annual inflation rate of 5%, if the present value of the house is $260,000.

    asked by sarah
  82. physics

    Calculate the net charge on a substance consisting of a combination of 8.9 × 10 13 protons and 2.6×10 13 electrons. The elemental charge is 1.6 × 10 −19 C. Answer in units of C

    asked by sara
  83. 7th grade science

    Q: An igneous intrusion cuts through three layers of sedimentary rock. which rock is the youngest? and why? A: A) the igneous intrusion B) the top layer of sedimentary rock C) the middle layer of sedimentary rock D) the bottom layer of sedimentary rock

    asked by Kate
  84. math

    How many grams of protein are in 100 grams of termites?

    asked by viviana
  85. Math

    Given a trapezoid ABCD with AD parallel to BC. The diagonals AC and BD are congruent. Prove that ABCD is an isosceles trapezoid.

    asked by Yuki
  86. physics

    A 10.0 kg block is released from point A in the figure below. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2350 N/m, and compresses

    asked by Emily Tran
  87. Precalculus

    The sides of an isosceles triangle are 10 cm, 10 cm, and 12 cm. A rectangle is inscribed in the triangle with one side on the triangle's base. The other two vertices of the rectangle are on the triangle's legs. Find the Maximum Area of the Rectangle.

    asked by Georges
  88. college algebra

    find the complex zeros of the polynomial function. write f in factored form. f(x)=x^3-10x^2+37x-52

    asked by ladybug
  89. Algebra

    Can you please help me with this? Convert 36.7 lbs/in(3) to kilograms per cm(3). (There are 14.59 kilograms in 32.174 pounds and 61.02 in(3) in 1000 cm(3)). Thank you!

    asked by Kate
  90. Chemistry hW

    For the emission spectrum of Be3+, calculate the lowest wavenumber νˉ (in inverse meters) of light produced by electron transitions between n=2, n=3, and n=4. I don't want to know the answer... Just tell me what I would need to do to work it out :) pls??

    asked by Anonymous
  91. Physics

    A film of magnesium fluoride (n=1.38), 1.25x10^-5 cm thick, is used to coat a camera lens (n=1.55). Are any wavelengths in the visible spectrum intensified in the reflected light? ---------------------------------------- Bats use the reflections from

    asked by Larry
  92. math

    On september 28, Jennifer Rick went to Park Bank to borrow $4,500 at interest. Jennifer plans to repay the loan on January 22. Assume the loan is on ordinary interest

    asked by linda
  93. algebra

    What is a polynomial function in standard form with zeroes 1,2,-3,and -3

    asked by lee
  94. Physic

    Air moving at 13.0 m/s in a steady wind encounters a windmill of diameter 2.30 m and having an efficiency of 29.0%. The energy generated by the windmill is used to pump water from a well 31.0 m deep into a tank 2.30 m above the ground. At what rate in

    asked by Thanh
  95. Chemistry..

    I want to be a pharmacist, so after high school do I go to a 4 year college and then another 4 year of pharmacy school? And also, how can I be well prepared as a high school student?

    asked by Anonymous
  96. Algebra

    Barbara and her husband take a trip on a highway, a distance of 600 miles. They intend to average 60 m.p.h. and take 10 hours. However, they take 11 hours due to construction. When they encounter the construction, they reduce their speed to 40 m.p.h. and

    asked by Kevin
  97. social studies

    what religion was part of the Song Dynasty ?

    asked by Katie
  98. Statistics

    If you roll a fair die 100 times and 35 of the rolls result in a six, what would be the probability of the outcome of a 2, P(2)? P(2) = 0.02 P(2) = 2 P(2) = 35 P(2) = 0.35

    asked by John
  99. Science

    Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 87.0

    asked by Anonymous
  100. Trigonometry Help

    4 tan x - 12 cot x = 0

    asked by Anonymous
  101. pesos

    How many dollars did he receive if he exchanged 42.7 pesos at a rate of $5.30 = 11.1 pesos.

    asked by Anonymous
  102. physics

    can anyone please help me on this one? A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45 degrees

    asked by johnathan
  103. Physic

    Air moving at 13.0 m/s in a steady wind encounters a windmill of diameter 2.30 m and having an efficiency of 29.0%. The energy generated by the windmill is used to pump water from a well 31.0 m deep into a tank 2.30 m above the ground. At what rate in

    asked by Thanh
  104. Physics 111-1

    A wheel, starting from rest, has a constant angular acceleration of 1.8 rad/s2. In a 3.7-s interval, it turns through an angle of 52 rad. How long has the wheel been in motion at the start of this 3.7-s interval?

    asked by Paula
  105. math 104

    From a survey of 100 college students, a marketing research company found that 50 students owned iPhones, 45 owned cars, and 35 owned both cars and iPhones.

    asked by jennifer
  106. Statistics (urgent)

    A beverage comopany uses a machine to automatically fill 1-liter bottles. Assume that the population of volumes is normally distributed. The company wants to estimate the mean volume of water to within 1 ML. Determine the minimum sample size required to

    asked by Erica
  107. Chemistry

    When people have indigestion or "heartburn" they often take an antacid to reduce the amount of stomach acid (hydrochloric acid). Two antacids are Mylanta (magnesium hydroxide) and Titralac (calcium carbonate). Jimmy prefres to take Mylanta because Titralac

    asked by Nicole
  108. Maths

    show that the semi vertical angle of a right circular cone of a given surface area and maximum value is sin-1 (1/3)

    asked by Marwein
  109. psycholoogy

    Behavioral geneticists and evolutionary psychologists emphasize

    asked by alexis
  110. maths

    change 30 in 04 in equlivent fraction

    asked by ritesh
  111. Chemical Engineering: Raoult's Law

    A binary mixture of benzene and styrene is kept in a closed vessel at equilibrium such that both liquid and vapor phases co-exist. The total amount of moles in the vessel is 100. The total moles of benzene that is distributed in the liquid and vapor phases

    asked by Silas
  112. Algebra

    Ray and Stella are both given jobs by the same company. Ray is to be paid a basic salary of $3000 each month. He will get a raise of $100 after the first month and every month thereafter he will get a raise of $100 more than the preceding month. Stella

    asked by Kevin
  113. ALGEBRA HELP OR I AM GONNA FAIL I CANT DO THIS

    compare two cell phone companies offers to see which is the better deal. Horizon Cell Phone Company Vertigo Cell Phone Company Base rate=$40 Plus every minute costs $0.05 vertigo company Base rate=$30 Plus every minute costs $0.07 Step 1: Write a linear

    asked by WORRIED
  114. Chemistry

    what happens when the nucleus of one atom attracts a pair of shared electrons more strongly than the nucleus of the other atom in the bond? If a molecule is polar as a result of a polar covalent bond, which end is positively charged and which end is

    asked by Chem Freak *not really*
  115. Math

    could you use a pictograph to display the data from a double bar graph?

    asked by Jaskuine
  116. Algebra

    there are a 1000 tickets. Price for children's ticket is 6.5. Adult tickets are 9.5. total tickets sales are 8444. how many adult and children tickets are sold. Using binomials to solve. x+y = 16 (1 child + 1 Adult = 16) 6.5X + 9.5Y = 8444 6.5(16-y) + 9.5Y

    asked by Anonymous
  117. Chemistry

    What happens when the nucleus of one atom attracts a pair of shared electrons more strongly than the nucleus of the other atom in the bond? If a molecule is polar as a result of a polar covalent bond, which end is positively charged and which end is

    asked by Balls
  118. Stats PLEASE HELP!!!

    Webcredible, a UK-based consulting firm specializ- ing in websites, intranets, mobile devices, and applications, conducted a survey of 1,132 mobile phone users between February and April 2009. The survey found that 52% of mo- bile phone users are now using

    asked by Tyler
  119. physics

    The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the minimum value of the temperature at which the engine takes in heat? (in oC).

    asked by chelsea
  120. Public Financial Management

    Analyze the following scenario: The Hospital for Ordinary Surgery uses pharmaceuticals for its patients. It started the year on January 1, with an inventory of 1,000 doses of an antibiotic drug that cost $17 per dose. On January 2, it purchased another 300

    asked by TITO
  121. physics

    An electric scooter has a battery capable of supplying 150 Wh of energy. If friction forces and other losses account for 60.0% of the energy usage, what altitude change can a rider achieve when driving in hilly terrain, if the rider and scooter have a

    asked by Emily Tran
  122. physics help!

    When a gas follows path 123 on the PV diagram in a rectangle shape labeled 1234 cycle, 449 J of heat flows into the system and 179 J of work is done. What is the change in the internal energy of the system? * I keep coming up with 270 but this is

    asked by emily
  123. debate

    i just need some point or info on pro side: - Taxes gain more money over time - Tax on capital gains at same rate as income tax will benefit the government con side: - When taxes get too high, economy goes into recession - trimming tax cuts are more simple

    asked by lauren
  124. Math

    there are 240 patients in a hospital with health insurance, while 60 patients are without health insurance. write a simplified ratio to express the number of insured patients to the number without insurance

    asked by Anonymous
  125. Physics ASAP

    Use the following numbers for this question. MEarth 5.98e+24 kg MJupiter 1.9e+27 kg MSun 2e+30 kg Earth-Sun distance 150000000000 m Jupiter-Sun distance 778000000000 m rE 6380000 m rJ 69000000 m G = 6.67e-11 Nm2kg-2 the acceleration due to gravity at the

    asked by Sierra
  126. math

    How long it will take for an investment of 1000 dollars to double in value if the interest rate is 9.5 percent per year, compounded continuously?

    asked by tailor
  127. Geometry

    What is the length of the line segment whose endpoints are 1-4 and9,2

    asked by Sea
  128. chemistry

    Which of the following diatomic molecules are isoelectronic to BN? Check all that apply. a)NO b)BeN c)C2 d)BeC

    asked by selly
  129. Science

    Give the value of the 1st ionization energy of beryllium (Be). Express your answer in Joules (J/atom).

    asked by Audrey
  130. AP Global

    Please, help! How did Islam unite and effectively rule diverse people and cultures?

    asked by Julia
  131. chemistry

    A salt was completely solbuble in water when this solution was treated with AgNO3 no precipitate was formed. What anions could be present?

    asked by Helen
  132. Chem

    C2

    asked by Anonymous
  133. Chemistry

    rank the following atoms and ions in the order of expected increasing radius: Ca, Ca2+, Ar Pls pls help me kindly... Anyone?

    asked by Anonymous
  134. Chemistry

    For the emission spectrum of Be3+, calculate the lowest wavenumber νˉ (in inverse meters) of light produced by electron transitions between n=2, n=3, and n=4. I don't want to know the answer, just tell me wat method I need to use to get there... Pls x

    asked by Anonymous
  135. Statistics

    Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the

    asked by John
  136. Chemistry

    1)Identify which concepts/topics you believe that you will need to apply to solve the problem below. Select all that apply. a)Covalent Bond Energy b)Ionic Bond Energy c)Single-electron Atom Ionization Energy d)Multi-electron Atom Ionization Energy

    asked by selly
  137. math

    One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It

    asked by Katarzyna
  138. math

    each week kelly saves 1/2 of her allowance she spends 1/3 of her allowance and 1/6 on games and movies. what does kelly do with the largest part of her allowance

    asked by miya
  139. math

    decide on a topic for which they would like to collect data and design a survey for school which could really be used to convince the principal to do. ex.fundraising,school uniforms These examples are already used by other classmates

    asked by Jaskuine
  140. Math Grade 12

    So the question is basically asking which mountains peaks can be seen from Oahu. Island Distance(Mi) Mountain Height(ft) Lanai - 65 - Lanaihale - 3,370 Maui - 110 - Haleakala - 10,023 Hawaii - 190 - Mauna Kea - 13,796 Molokai - 40 - Kamakou - 4,961 A)

    asked by Vanessa
  141. physics

    Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant

    asked by chelsea
  142. retail pharmacy assistant

    1)a customer's first impression is based on the pharmacy assistants ? a)overall appearance b)grammar c)tone of voice d)vocabulary my answer is b 2)besides the dispensing of drugs,the main purpose of pharmacy today is to ? a)sell a variety of retail

    asked by susue
  143. PHYSICS

    1. A body of mass 400g dropped from a height of 30m. If after rebounce the ball loses 2/3 of its energy, calculate: .the velocity before bounce, .the height after rebounce, .the velocity after rebounce

    asked by MATTHEW GOWOK POLIT
  144. math

    Find all possible whole-number lengths and widths of rectangles with each area given below. a) 12 cm^2 b) 17 cm^2 c) 20 cm^2 d) 24 cm^2

    asked by Ely
  145. movement and music

    A lesson plan consisting of ______themes might focus on body-part identification, one element of movement, one lcocmotor skill, and one non-locomotor skill. A)classroom B)unit C) weekly D) multiple movement Just to check to make sure my answer is right. I

    asked by Anonymous
  146. math

    if an object on earth is projected upward with an initial velocity of 32 feetper second, then its height after t seconds in given by h(t)=32t-16t^2

    asked by Anonymous
  147. physics

    The electric motor of a model train accelerates the train from rest to 0.755 m/s in 19.5 ms. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration.

    asked by Emily Tran
  148. Business math

    To help consumers in this tough economic climate, Pikes Peak Harley-Davidson offered to finance a new motorcycle for qualifying customers at 13% down, 7.50% interest for 48 months during July 2009. Rich Martinez was interested in calculating what his

    asked by lo
  149. algebra

    How to solve problem step by step 0.08x+0.09x

    asked by simone
  150. Math

    3x/4 - 2x/3 = 2/5

    asked by Betsy
  151. statistics

    Question 1 Shown below are rental and leasing revenue figures for office machinery and equipment in the United States over a seven-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and

    asked by Anonymous
  152. statistics

    Webcredible, a UK-based consulting firm specializ- ing in websites, intranets, mobile devices, and applications, conducted a survey of 1,132 mobile phone users between February and April 2009. The survey found that 52% of mo- bile phone users are now using

    asked by Anonymous
  153. Math

    A man traveled a distance of 22km in one hour,partly in a car at a speed of 30km/hr and partly on a motorcycle at 18km/hr.find the distance travelled by him in the car. Ans is 10km plz gve me fst sltn

    asked by Simran kaur
  154. Chemistry

    Fool's gold is not gold at all but only lead IV sulfide. If you have 751.0 grams of lead how many grams of fool's gold can you make? Ans: Pb+2S->PbS2 Given * (1/amu of given) * (mol of find/mol of given) * (amu of find/1mol)

    asked by Maria
  155. Science

    I am studying waves and doing a project. Is the line of origin the same as a waves midpoint?

    asked by Jenny
  156. English Help Please

    What literary devices do you see in this monologue? For example is there figurative language or symbolism? How do these literary devices contribute to a deeper meaning of this monologue? what specifically do they tell you about the character speaking or

    asked by Mello
  157. Computing

    Write a program that displays the following menu: 1 = Square 2 = Circle 3 = Ellipse 4 = End program When the user selects a shape from the menu, the program should ask for any necessary data, either: the length of the square’s side, the circle’s

    asked by CAMMY
  158. chemistry

    Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=2.091 A˚. What is the maximum wavelength (in meters) of

    asked by selly
  159. Geometry

    Given the points A(−2, 1) and B(3, 4), what are the coordinates of point C in the fourth quadrant such that mCAB = 90 degrees and AB = AC? Express your answer as an ordered pair.

    asked by Sam
  160. physics

    An engine with an output of 233.0 W has an efficiency of 36.0 %. It works at 8.00 cycles/s. How much heat is rejected each cycle? * I found that work done per cycle is 29.1 J. Im not sure what to do next

    asked by nick
  161. Math

    Evaluate Integral x^2+4 / x^4+x^2+16 dx

    asked by Ashwin
  162. math

    compare two cell phone companies and determine which is the better deal. Needs to be in a y=mx+b equation for each company. company a $40 base rate plus every minute costs .05 company b base rate $30 plus every minute costs .07 based on 800 minutes PLEASE

    asked by dan
  163. social studies

    In early Korea what were the strongest influences?

    asked by Erin
  164. marketing

    I am struggling with how to outline this paper....a little guidance please. It is only 2-3 pages, so not too long. Create an online focus group study using the framework you prepared in your first Research project on the company that your are interested OR

    asked by chelsea
  165. Chemistry :(

    Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 94.0

    asked by Anonymous
  166. social studies

    why do they call the presidents wife the first lady

    asked by piper
  167. Mythology Assignment

    I need to find some detailed information on the Twelve Labours of Hercules on an academic website. I need to know who were the helpers of Hercules, his goals, rewards for the completion of the 12 labours, and how he overcame his tasks.

    asked by Alex L.
  168. English in a local High School

    Can you help me do my Sunday assignment? I don't quite understand what it is I need to do?

    asked by Anonymous
  169. Physics

    Evaluate the following as true or false. If the Earth shrank in size, but all other factors remained the same, all of its satellites, including the Moon, would fly off into space. a) True b) False

    asked by Kelvin
  170. English

    I have to draw Helen Robinson from To Kill a Mockingbird for English. I have no idea how to start or what she looks like. Any help?

    asked by Stacy
  171. Trigonometry

    Does it make a difference whether you translate a graph first and the scale the image, or scale the graph first and then translate the image?

    asked by Rachel
  172. Medical coding

    What icd-9 procedure code is used for a hemilaminectomy medial facetectomy and foraminotomy?

    asked by Janet
  173. Chemistry

    How would you determine the concentration of H+, H2A and MB+ in a solution containing volumes of: H+ 600 microliters H2A 500 microliters MB+ 100 microliters H20 800 microliters

    asked by Cristian
  174. chemistry

    Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 87.0

    asked by Anonymouse
  175. chemistry

    Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=4.091 A˚. What is the maximum wavelength (in meters) of

    asked by Anonymouse
  176. Science

    What is the Frosted Eflin's role in the food chain?

    asked by Jason
  177. chem

    which of the following has the highest internal energy , Lake Michigan in the winter at 0 degress celcius or a lighted match at 850 degress celcius? I think it is lake michigan because it is so much larger but i am not sure.

    asked by mike
  178. Physics

    An 80 kg man climbs a 50 m-high hill in 20 minutes. What is the average power in watts he expends climbing the hill?

    asked by Mark
  179. English

    1. People were worried that their souls might not get back into their bodies. 2. People were worried because their souls might not get back into their bodies. (Are both the same? Is 'that....' an adverbial phrase?) 3. He was happy that she got the first

    asked by rfvv
  180. writing

    so im studdying truth at school, and for my assignment we are asked, what is truth, and i have no idea how to answer it and it's due in 3 days HELP!!!

    asked by bindi
  181. Physics

    A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.

    asked by Erika
  182. pre cal

    finding the standard form the center eccentricity vertices foci and minor axis endpoints of the equation 12x^2+4y^2-24x-4y+1=0

    asked by beene
  183. Chemistry

    What generally happens to metal oxides when you heat them ?

    asked by Jazmine
  184. english

    What does Atavism mean? I don't understand the dictionarys definition

    asked by Blaze
  185. writing conclusion

    How long should a conclusion be??? 2-4 sentences?

    asked by Celest
  186. math

    Therese Felser manages a grocery warehouse which encourages volume shopping on the part of its customers. Therese has discovered that, on any given weekday 70 percent of the customer sales amount to more than $ 100. That is any given sale on such a day has

    asked by Katarzyna
  187. Check my precalc

    what is the f inverse of f(x)= ln(x-3) I got y= e^x - 4 Solve 8 times 10^(2x-7)=3 I do not know how to do this. Do i get 8 and 10 with the same base? How? Thanks!

    asked by Rebekah
  188. science, chemestry

    Identify which concepts/topics you believe that you will need to apply to solve the problem below. Select all that apply. Covalent Bond Energy Ionic Bond Energy Single-electron Atom Ionization Energy Multi-electron Atom Ionization Energy Electronegativity

    asked by smile
  189. chem

    Write the condensed electron configurations for the following atoms and indicate how many unpaired electrons each has. for Ca and Y for Ca i got [Ar] 4s2 but it got cuonted wrong

    asked by Samantha
  190. Chemistry

    A reaction is peformed in which 50 ml of .400M silver nitrate and 75 ml of .100M hydrochloric acid are mixed together. The initial temperature of the solutionn was 25 C and the final temperature was 27.2 C. What is the enthalpy, in kj/mol, for the

    asked by Lydia
  191. Math

    My math teacher gave us this problem. Put the numbers 8,6,2,5,10,1,3,7,9,4 in number order of 1 to 10 in 5 moves. You can move 1,2,or 3 numbers for each move. If you don't have time to solve, any tips would be great!

    asked by Amy
  192. english

    please proofread my contrast and comparision paper Another War for the People of the United States Although the Air Force, Navy, and Army were different in the 1940's and the 200's show that, even though technology and communication have improved,

    asked by austin
  193. Psychology

    A psychologist is performing an experiment involving a controlled group and an experimental group. With the experimental group, the psychologist is giving a placebo and labeling it as caffeine pill. The control group receives a caffeine pill, which is

    asked by Angie
  194. movement and music

    ______ should continue to be stressed in a movement program for early elementary. A) cooperation B) competition C) Product D) ability Need help with this question. Just to make sure my answer is right. I believe its A.

    asked by Anonymous
  195. Chemistry

    Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 95.0

    asked by help plz
  196. Consumer Price Index

    Assume the CPI continues to increase at the same rate as the past 10 years. How much would your salary need to be in 20 years to have the many buying power as today?

    asked by Tart
  197. math

    how many lines can connect 3 coplanar points?

    asked by Mary
  198. Calculus [finding slope of tangent line]

    Find the slope of the tangent line to the curve 0x^2−2xy+2y^3=10 at point (-4,1) Help please? Thanks in advance

    asked by Ali
  199. math

    1). Using the function: y=y0,(.90)^t-1. In this equation y0 is the amount of initial dose and y is the amount of medication still available t hours after drug is administered. Suppose 20mg of the drug is administered. How long will it take for this initial

    asked by Britt
  200. physics

    ir moving at 10.0 m/s in a steady wind encounters a windmill of diameter 2.30 m and having an efficiency of 26.5%. The energy generated by the windmill is used to pump water from a well 28.0 m deep into a tank 2.30 m above the ground. At what rate in

    asked by Emily Tran
  201. college

    square root 9v+7=5

    asked by Anonymous
  202. physics

    Give ten [10] energy transformation processes

    asked by MATTHEW GOWOK POLIT
  203. history ASAP

    in what sense did the us seem to be developing into two nations in the 1950 and 1960's . What was really happening ? Did it stop ? why?

    asked by mary
  204. differentiation

    Derive the central difference approximation for f′′(x) accurate to O(h4) by applying Richardson extrapolation to the central difference approx- imation of O(h2).

    asked by micheal
  205. Pre-Calculus

    Convert the equation y=5 to polar form.

    asked by George
  206. homework

    x^2/x^2+3*x+9/x=

    asked by Anonymous
  207. college algebra

    form a polynomial f (x) with real coefficients having the given degree and zeros. degree 5; zeros 5; -i; -6+-i f(x)= a(?) Please show step by step work.

    asked by ladybug
  208. Math

    3k/4 - 28 - 2k/3 = 37

    asked by Betsy
  209. accountyin question

    how does one prepare a pro forma income with different assumptions given the numbers for current year sales revenue 2,000,000 Cost of goods sold 1,400,000 Gross profit 600,000 Selling & admin.expenses 260,000 Net income 340,000 Cost of goods sold is

    asked by irene thomas
  210. Chemistry

    How many possible orbitals are there for n= 4?

    asked by Daniel
  211. math

    -(4/3)^2+(4/3)^0+4/3-(-4/3)^2+|-(4/3)^2|

    asked by sam
  212. Math

    a car model has a ratio 1:36 scale. if a piece on the model is exactly one inch in legnth, how many feet would the actual piece be?

    asked by Anonymous
  213. college algebra, Please help!!

    use the intermediate value theorem to show that the polynomial function has a zero in the given interval. f(x)=4x^3+3x^2-8x+7;[-5,-2] please show all work

    asked by ladybug
  214. Chemistry

    A gaseous mixture consists of 6.95 g of N2, 4.75 g of O2, and 2.75 g of He. What volume does this mixture occupy at 23°C and 1.35 atm pressure?

    asked by Matt
  215. fractions

    put into least to greatest a)7/4, 15/1, 11/5, 2 b) 10/4, 2&1/3,9/2, 3

    asked by anonymous
  216. college algebra, Please help!!

    find a bound on the real zeros of the polynomial. f(x)=x^4+2x^3-8x-7 every real zero of f lies between -? and ? *pleasae show all work*

    asked by ladybug
  217. statistics

    The following data lists the average monthly snowfall for January in 15 cities around the US: 38 0 47 32 42 31 40 47 35 43 36 17 36 8 1 Find the mean, variance, and standard deviation. Please show all of your work.

    asked by Huffette
  218. college finite math

    Find the marginal average cost function: C(x)=10-e^-x

    asked by Jenny
  219. college algebra

    use the rational zeros theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x)=x^3-8x^2-31x-22

    asked by ladybug
  220. Math

    55% of the studnts in a school are girls.find the total no. of studnt in the school if the no. of boys is 18 .

    asked by Simran kaur
  221. chimistry

    Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=3.591 A˚. What is the maximum wavelength (in meters) of

    asked by School girl
  222. penn foster

    exam003062rr the staff

    asked by tina
  223. simplest form

    what is the simplest form of 1/4?

    asked by Lilly
  224. social studies

    what was Europe's major religion during the Enlightenment period?

    asked by Erin
  225. Math

    In 500cmcube of alcohol solution the percentage of alcohol by volume is 80%. Find the volume of water that must be added to the solution so that the ratio of the volume of alcohol to that of water becomes 5:2? Please some one give me answer

    asked by Mani