Questions Asked on
October 19, 2012

  1. Chemistry

    What is the enthalpy change (in kJ) for burning 49.0 g of methyl alcohol? I tried this question and got the wrong answer of 1047.74. A gas is compressed from 73.7 L to 1.9 L at 0.70 atmospheres? In addition a total of 4400 J of heat are gained from warmer

    asked by Anonymous
  2. Math Grade 5

    Mr. Jacob is 55 years old and Tony is 7 years old. In how many years will Mr. Jacob be 4 times as old as Tony? Please help me solve this.

    asked by Ann
  3. physics

    Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the figure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg F a) What

    asked by Anonymous
  4. Chemistry

    A solution of NaOH was obtained by dissolving 5.6g of NaOH pellets in 100cm^3 of water. What is the concentration of resulting solution?

    asked by HandsomeLala
  5. Algebra

    A bag contain 9 red, 8 yellow, 5 pink and 6 blue marbles. The experiment is to randomly select on marble out of the bag. What is the probability that chosen marble is a)blue? b)yellow? c) red or pink d)green or blue? need to know what all are

    asked by #@@#
  6. Chemistry

    Which salts cannot be prepared by an acid-alkali titration method? And why? A. Sodium sulfate B. Ammonium sulfate C. Potassium nitrate D. Iron(II) nitrate

    asked by HandsomeLala
  7. physics

    Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the figure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg F a) What

    asked by Anonymous
  8. physics

    Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the figure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg ) What is

    asked by Anonymous
  9. Social studies

    Posted by rfvv on Thursday, October 18, 2012 at 9:03pm. How many lakes does the National Trust in England have? It's hard to find the information about that on the Internet. About 136 lakes or 500 lakes? Would you let me know that or the website? Thank

    asked by rfvv
  10. physics

    What is magnitude

    asked by Anonymous
  11. Algebra Grade 7

    How do you find the sales tax? How do you find the discount price? Please help me, I really appreciate it. This is for studying and I am completely stuck. Thanks in advance to any and all help.. luv ya, ♥dino♥

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

    Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the figure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg d) What is

    asked by Anonymous
  13. chemistry

    1. How many grams of NaCl are present in 15 mL of a 2.0% solution?

    asked by alexa
  14. Algebra Grade 7

    Matt and Michelle enjoy a romantic evening at The Golden Lamp. They spent $40. The waiter has done an excellent job, and they want to leave him a nice tip of 15%. As generous restaurant patrons, they will tip the waiter after the tax of 7% is calculated.

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

    a scared kangaroo clears a fence that is 2.44 meters tall. what is the vertical component of the kangaroos velocity at take off (vfi) ? if the horizontal component of the kangaroos velocity is 4.80m/s at what angle did the kangaroo take off the ground?

    asked by karen
  16. chemistry

    Porassium alum is 3.9 parts per 100 parts of water. Knowing this, how many moles of potassium alum are present in 50ml?

    asked by Lex
  17. trig

    A 15 FOOT LADDER MAKES 52 DEGREES ANGLE WITH THE GROUND.HOW FAR WILL THE TOP OF THE LADDER BE ABOVE THE GROUND?

    asked by GLAIZY JEAN
  18. algebra

    the mid point of a segment joining (a,b) and (-3,4b) is (2,3a+4).find a & b.

    asked by boss
  19. Algebra

    The cost of 5 similar cameras and 3 similar video cameras is $3,213. Each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he pay?

    asked by Chris
  20. Math

    If I found 52 feet of board and build a triangual garden using all of the board. If the largest side is 4 more than 4 times the smallest and the other side 3 times the smallest, how long will each side be?

    asked by Deshaun
  21. science[physics]

    three masses 3kg,4kg,5kg are located at corners of an equilateral triangle of side 1m.locate the centre of mass of the system

    asked by anmol
  22. Chemistry

    Silver has an average atomic mass of 107.9 u and is known to have only two naturally occurring isotopes. If 51.84% of Ag exists as Ag-107 (106.9051 u), what is the identity and the atomic mass of the other isotope?

    asked by Anonymous
  23. Chemistry

    A radio wave has a frequency of 3.6 x 10^10 Hz. What is the energy (in J) of one photon of this radiation?

    asked by Anonymous
  24. grammar

    What is the verb in this sentence? Unlike rita, she had very few friends.

    asked by Eileen
  25. algebra

    mike's automall has 130 cars on clearance all either red blue or green. there are four times as many red as green, and twice as many blue as red. how many of each color do they have

    asked by renee
  26. Health

    in the easiest explantion what does the bacteria streptococcus do? thanks

    asked by HEALTH
  27. phyics help nedded

    In the figure below, three ballot boxes are connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The masses are mA = 24.0 kg, mB = 40.0 kg, mC = 30.0 kg. (a) When the assembly is released from

    asked by some one
  28. science

    Will the current flow when neutron or proton are in the place of electron.if yes , then explain how and if answer is no then describe why.

    asked by sajid khan
  29. dps

    An angle is 25 degree less than the complement find its measure

    asked by jad
  30. Physics

    A trunk of mass m = 1.100 kg is pushed a distance d = 32.0 cm up an incline with an angle of inclination theta = 26.0 ° by a constant horizontal force P = 150. N. The coefficient of kinetic friction between the trunk and the incline is 0.330. a) Calculate

    asked by Steeve
  31. maths

    an angle is 45 degree less than 2 times of its supplement, then the greater angle is

    asked by ajay
  32. Math

    find the parralel of latitude along which a journey of 166km makes a change of 4 degree in longitude give answer to the nearest degree

    asked by flexy
  33. reading

    According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about

    asked by Anonymous
  34. chemistry

    How many moles of water are there in 5 moles of Tungsten(V)oxalate tetrahydrate?

    asked by chemdummy
  35. Math Statistics

    Czarina is working part time at a pastry shop baking cupcakes. If she works for 30 hour in one week on the average, how many hours a day does she work?

    asked by Amelia
  36. chem

    if a car produces 81g of {\rm CO_2}, how many grams of {\rm O_2} are used up in the reaction? the complete chem reaction is C2H6O+3O2--->2CO2+3H2O

    asked by tracy
  37. Math Statistics

    What is the difference between "weighted mean" and "arithmetic mean?"

    asked by Amelia
  38. Math

    Prove by induction that 9^(n+2)- 4n is divisible by 5 for n greater than or equal to 1. Thanks.

    asked by Candice
  39. Math Statistics

    Czarina is working part time at a pastry shop baking cupcakes. If she works for 30 hours in one week on the average, how many hours a day does she work if she works 5 days a week?

    asked by Amelia
  40. maths

    by equating the coefficients of sin x and cos x , or otherwise, find constants A and B satisfying the identity. A(2sinx + cosx) + B(2cosx - sinx) = sinx + 8cosx I got A = 2, B = 3, which the answers said were correct. However, another part of the question

    asked by Candice
  41. social studies and government

    what were the arguments between marbury and madison.

    asked by Naomi
  42. math

    7y + 8 = 57, then 2y =

    asked by tamra
  43. Accounting

    Financial Accounting 1. The following information was made available from the income statement and balance sheet of Meranda Company: ITEM 12/31/2010 12/31/2009 Accounts Receivable $ 42,000 $ 45,100 Accounts Payable 27,900 24,500 Merchandise Inventory

    asked by Angie
  44. Physics (Difficult)

    A uniform rectangular bar with cross-section 66 mm x 54 mm and of length 1.7 m has mass 16kg. It pivots about an axis prependicular to the wider face. The axis is equidistant from the edges and 170 mm from one end. What is the relevant second moment of

    asked by Alex
  45. Math

    Quadrilateral PQRS has vertices P(0,6), Q(-6,-2), R(2,-4), and S(4,2). Verify that the quadrilateral formed by joining the midpoints of the sides of PQRS is a parallelogram.

    asked by Vanessa
  46. chemistry

    Consider the formation of cyanogen c2n2 and its subsequent decomposition in water given by the equations 2Cu2+ + 6CN- 2[Cu(CN)2]- + C2N2 C2N2 + H2O HCN + HOCN How much hydrocyanic acid HCN can be produced from 35.00 g of KCN, assuming 100% yield?

    asked by Arik
  47. math

    what is a set of atleast twelve numbers that have the following landmarks: maximum:8 Range:6,mode:6,median:5 Show a bar graph of the data

    asked by kaleb
  48. math

    what is a set of atleast twelve numbers that have the following landmarks: maximum:8 Range:6,mode:6,median:5 Show a bar graph of the data

    asked by kaleb
  49. algebra

    factor the expression by using areas X^2+2x-3 solve the inequality (enter infinity for and infinity for-8 as needed.7 is less and equal 2-y

    asked by missfubu-c
  50. Ap Chemistry

    What is the energy of a photon corresponding to radio waves of frequency 1.465 106 /s?

    asked by abd
  51. chemistry

    When nitrogen dioxide (NO2) from car exhaust combines w/ water in the air it forms nitric acid (HNO3), which causes acid rain, and nitrogen monoxide. 3NO2(g)+ H2O(L)----->2HNO3(aq)+ N(g) a.How many molecules of NO2 are needed to react with 0.250 mole H2O?

    asked by anonymous 78
  52. 4th grade math

    product 108and 4 find product 324 and 4

    asked by Anonymous
  53. chemistry

    When nitrogen dioxide (NO2) from car exhaust combines w/ water in the air it forms nitric acid (HNO3), which causes acid rain, and nitrogen monoxide. 3NO2(g)+ H2O(L)----->2HNO3(aq)+ N(g) a.How many molecules of NO2 are needed to react with 0.300 mole H2O?

    asked by anonymous 78
  54. Physics

    When an electron moves 2.5 m in the direction of an electric field, the change in electrical potential energy of the electron is 8x10-17J. What is the strength of the electric field that causes the change in potential energy? 320 N/C 200 N/C 20 N/C 3.2 N/C

    asked by La La
  55. physic

    A 2,300-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.00 m before coming into contact with the top of the beam, and it drives the beam 9.4 cm farther into the ground as it comes to rest. Using energy

    asked by Anonymous
  56. College Math

    Find the area of a rectangle if three of its corners are (-3.7, -3.1), (1.2, -3.1), and (1.2, 5.3). Hint: find the 4th corner first.

    asked by Richard D
  57. College Math

    A clarinet factory wants to maximize profits. They can produce 250 clarinets per week at a cost of $300 per clarinet, and sell them for $1000 per clarinet. And, they can produce 350 clarinets per week at a cost of $275 per clarinet, and sell them for $900

    asked by Richard D
  58. Math

    Ella babysits for 3/4 hour before school each morning. a) How many hours does she babysit in a 5- day work week? b) How many hours does she babysit in 4 weeks?

    asked by Cherie
  59. English - Writing Sentences & Paargraphs

    Can you please review my revised paragraph? I have been working on this for two weeks. Need help! thanks so much Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two

    asked by Darlene
  60. math

    by selling an article for rs.1200 the shopkeeper lost 10 percent .at what price he have sold it to gain 10percent.

    asked by TUHITUHI
  61. Math

    he perimeter of a triangular-shaped garden is 58 feet. The longest side of the garden is 3 times the length of the shortest side of the garden. The other side of the garden is 18 feet more than the shortest side of the garden. What is the length of the

    asked by Lora
  62. math

    the value of a piece of land is increased by 20 percent if now it worth 15 lac ,what is the originalprice of the land

    asked by TUHITUHI
  63. business law

    The initials "L.S." at the end of a document mean?

    asked by lisa
  64. English - Writing Sentences and Paragraphs 1

    Please help! I have been working on this for two weeks! I have read the book several times. I need to turn this is soon. I took all of your suggestions into consideration and basicallly rewrote the entire paragraph. Please review again... thanks This is

    asked by Darlene
  65. College Math

    A temperature of 38 degrees Fahrenheit (F) is equivalent to 276.483 degrees Kelvin (K), while a temperature of 75 degrees F is equivalent to 297.039 degrees K. (a) Using the algebra methods from this class, find the equation converting Kelvin temperature

    asked by Richard D
  66. College Math

    Find an equation in slope-intercept form passing through the points (-4.7, 16.3) and (-2.9, 16.3). Hint: first find the slope!

    asked by Richard D
  67. College Math

    Mary buys $32,000 worth of gold, and sells it a year later for $41,000. If she is required to pay 23% capital gains tax on her profit, how much tax will she pay?

    asked by Richard D
  68. College Math

    Using EZgraph, graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph. 3. 4.9x – 7.2y = 2.3 4. 2x = -8 5. 3.7x + 4.2y = 5.03

    asked by Richard D
  69. College Math

    Find the area of a rectangle if three of its corners are (-3.7, -3.1), (1.2, -3.1), and (1.2, 5.3). Hint: find the 4th corner first.

    asked by Richard D
  70. Physic

    A bullet with a mass of 4.0 g and a speed of 736 m/s is fired at a block of wood with a mass of 0.075 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits the

    asked by Hey
  71. lansing stem academy

    math is learn more about science and social studies

    asked by reh
  72. Algebra 2

    (18-n)^(1/2)=(n/8)^(1/2)

    asked by Bart
  73. perimeter and area

    what is 800cm times 15cm help me find the area cm2

    asked by sophie
  74. Physics

    A truck carrying a 38 kg crate accelerates uniformly from rest to 87.5 km/hr in 12.1 s. Calculate the work done on the crate by the truck. Please help:/

    asked by Caddy
  75. 2012faCJC-111-NWB1

    Why is public order necessary? Do we have enough public order or too little? How can we tell? What might a large, complex society such as ours be like without laws and without a system of criminal justice? Would you want to live in such a society? Why or

    asked by Anonymous
  76. maths

    if tn=2n what are the first four terms of thepattern

    asked by Anonymous
  77. Physics

    A skier of mass 79.1 kg, starting from rest, slides down a slope at an angle q of 38 with the horizontal. The coefficient of kinetic friction, m, is 0.09. What is the net work (the net gain in kinetic energy) done on the skier in the first 8.9 s of

    asked by Brianna
  78. science- physics

    A rotating wheel requires 4.17 s to rotate through 37 rev. Its angular speed at the end of the 4.17 s interval is 104 rad/s. What is its constant angular acceleration? Assume the angular acceleration has the same sign as the angular velocity.

    asked by joe
  79. Algebra

    The number of hours of flight for 12 pilots: 11, 13, 5, 7, 5, 13, 18, 16, 5, 19 Find the mode, the median and the mean?

    asked by #@@#
  80. Chem

    A gas is compressed from 73.7 L to 1.9 L at 0.70 atmospheres? In addition a total of 4400 J of heat are gained from warmer surroundings. What is the change in internal energy in kJ? I have a general idea of how to do this, but I tried and got -2851.8,

    asked by Anonymous
  81. physics help

    Two 12.0 kg boxes are connected by a massless string that passes over a massless frictionless pulley as shown above. The boxes remain at rest, with the one on the right hanging vertically and the one on the left d = 2.9 m from the bottom of an inclined

    asked by arcos15
  82. chemistry

    Why adding NH4OH to Al3+ , forms Al(OH)3 and not complex ion Al(NH3)3 ? thanks so much

    asked by Negah
  83. Physics

    When a torch is brought 2 times closer, how many times brighter will it appear? 2 4 9 16 At first, I figured the answer would be the obvious (2), but then I second-guessed myself and figured 4

    asked by Derp
  84. General Chemistry

    What effect would tap water have on the volume of EDTA required for titration?

    asked by Kasia
  85. Algebra 2

    (1/(n^2))+(1/n)=(1/(2(n^2)))

    asked by Bart
  86. English

    How does the poem(Ode on a Grecian Urn) express both the positive and negative sides of the search for beauty?

    asked by Chanel
  87. physics ..PLEASE HELP ASSIGN DUE SOON :(

    Three charges, q1=+45.9nC q2=+45.9nC and q3=+91.8nC are fixed at the corners of an equilateral triangle with a side length of 3.70cm. Find the magnitude of the electric force on q3.

    asked by Ann
  88. Chemistry

    How would you prepare 1000.0ml of 0.600M NaOH solution starting from concentration of 1.000M

    asked by Tasha
  89. Chemistry

    In the following acid—base neutralization reaction HNO3(aq)+ KOH(aq) ----KNO3(aq) + H2O (I) What is the molarity (M) of an HNO3 solution if 50.0 ml is needed to react with 25.0 ml of 0.150M KOH solution?

    asked by Tasha
  90. Physics

    A 6.00 cm tall candle is placed at a distance of 30.0 cm from a double convex lens having a focal length of 15.0 cm. How tall is the image? 1.50 cm 3.00 cm 6.00 cm 9.00 cm I honestly don't even know where to begin with this one, but if I guessed, I would

    asked by Derp
  91. chemistry

    Based on the following chemical equation, answer the questions below. Show all your calculation The balanced chemical reaction of iodine with hydrogen sulfide is as follows: H2S(g)+I2(s)-----2HI(g) + S(s) (a) Based on the above chemically balanced

    asked by Tasha
  92. cHEM

    cThe price of gold is $625 per troy ounce at this writing. How much heat (in J) is needed to raise the temperature of $5000.00 worth of gold from 29.5 oC to 70.5 oC? (1 troy oz = 31.10 g and the specific heat of Au is 25.42 J/(moloC).) I got 5.125, which

    asked by Anonymous
  93. Physics

    30. A truck of mass 2250 kg is used to pull a 330 kg trunk out of an old quarry as shown below. There is 550 N of rolling resistance for the truck. Ignore mass and friction of the pulley. (a) If the trunk is accelerated upward at 2.00 m/s2 what is the

    asked by Liz
  94. chemistry

    Why Al(OH)3 precipitation is red ? Is this the result of electron transition? Thanks for your help :)

    asked by Negah
  95. Algebra 2

    (2v-7)^(1/2)=v-3

    asked by Bart
  96. English

    Did I do these correctly? (This homework question was removed due to a copyright claim submitted by K12 Inc.)

    asked by Lauren
  97. Physics

    When an electron moves 2.5 m in the direction of an electric field, the change in electrical potential energy of the electron is 8x10-17J. What is the strength of the electric field that causes the change in potential energy? 320 N/C 200 N/C 20 N/C 3.2 N/C

    asked by Blah
  98. math

    a boy 45 in tall casts a shadow 90 long. At the same time his father casts a shadow 144 in

    asked by Anonymous
  99. 6th grade math

    a toy company manufactures miniature cars. They sell 15 miniature sports cars in a box. They sell 12 miniature trucks in a box. Mrs. Murphy wants to buy an equal number of sports cars and trucks. What is the least number of miniature sports car she can

    asked by miki
  100. fin/370

    a bond that has a 1000 par value (face value and a contract or coupon interest rate of 10.9%. the bond have a current market value of $1,120 and will mature in 10 years. the firm's marginal tax rate is 34%. the cost of captial from this debit is

    asked by michelle
  101. Science

    when do human interventions in water availability pose serious problems to freshwater accessability?

    asked by Traci Davis
  102. Physics

    Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light

    asked by Blah
  103. Physics

    The maximum current in an AC circuit is 3.0 Amperes. What is the rms value of the current in the AC circuit? 0.5 A 2.1 A 3.0 A 4.2 A My answer is 2.1A.

    asked by La La
  104. colledge 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 shyne
  105. Algebra 1

    Solve 7+x-15=-2 2/3

    asked by Monica
  106. Physics

    A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100 m/s. What is the force experienced by the proton if it enters parallel to the direction of the magnetic field with a speed of 200

    asked by Anonymous
  107. Physics

    What happens to the force between the charges if the distance between the charges is increased to two times its original value? Value of the force is increased by two. Value of the force is decreased by two. Value of the force is decreased by four. Value

    asked by I'm bad at physics
  108. Algebra 1

    -3 1/2= 1/2x+1/2x+x

    asked by Monica
  109. physics

    Bonnie and Clyde are sliding 500 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 385 of force while Bonnie pulls forward on a rope with 300 of force.What is the safe's coefficient of

    asked by Kris
  110. physics

    14. A racing car accelerates uniformly through three gears, changes with the following average speed: 20 for 2.0 s 40 for 2.0 s 60 for 6.0 s What is the overall average speed of the car? A. 12 B. 13.3 C. 40 D. 48 E. 37

    asked by Anonymous
  111. Physics

    A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere? 4x10^-13 10x10^13 4x10^13 10x10^-13 I'm stuck between A or D...

    asked by I'm bad at physics
  112. Science

    Calculate the molarity of the following solution: 7.48g of calcium chloride (CaCl2) in 215 mL of aquous solution.

    asked by Emily
  113. Science

    10.0 g of KCl and 18.5 g of CaCl2 were dissolved in 500 mL of water. How many mL of 1.57 M AgNO3 solution would be required to precipitate all Cl- from the solution?

    asked by Jared
  114. Program Logic Design

    create a flowchart that shows the logic for a program that generates a random number; then ask the user to think of a number between 1 and 10. The display then randomly generated number so the user can see whether his or her guess was accurate.

    asked by Sonya
  115. Physics

    What equation illustrates the relationship between the electric field strength and the potential difference? E = d / v E = v / d d = E(v) E = v(d) I'm honestly clueless on this one

    asked by I'm bad at physics
  116. 7th grade literature help please ASAP Ms.Sue?

    I need to write a paper for school. The directions are: "Research to find how the following connect to the author, Kurt Vonnegut, Jr.: Cloud seeding, World War II, Purple Heart, Kilgore Trout. Include any other interesting facts." So far, this is what I've

    asked by Delilah
  117. Physics

    You have a 40 inch wheel tow 20 inch wheel to a 5 inch wheel how many revolutions does the 5 inch wheel have to make to make the 49 inch wheel rotate 1revolution?

    asked by Richard
  118. Chemistry

    A hot air balloon has a volume of 55,287 m3 at 60C, what is its volume at 20C?

    asked by Nomi
  119. Physics

    If you have a 40 inch wheel connected to a 20 inch wheel connected to a 5 inch wheel how many rotations need to make in order for the 40inch wheel to make 1rotation?

    asked by Anonymous
  120. maths

    For i; j 2 N let (i; j) denote the ordered pair in the cartesian product N  N and fi; jg  N the subset consisting of the elements i and j. De ne the sets A and B as follows: A := f;; 1; 2; (1; 3); (3; 1); f1; 3g; f3; 1gg, B := f3; (1; 2); (2; 1); f1; 2g;

    asked by Nithiya
  121. maths

    Find x in the following expressions: 1. (111)10 = (x)3;

    asked by Nithiya
  122. maths

    Find g := gcd(389; 222) and a; b 2 Z such that g = a  389 + b  222.

    asked by Nithiya
  123. maths

    Let m; n; z 2 N such that m and n divide z and gcd(m; n) = 1. Prove that m  n divides z.

    asked by Nithiya
  124. algebra

    A furnace duct forks into 2 ducts. Flow coming in is 2300cfm. If flow coming in 1 duct is 800cfm more than other what is flow to each duct in cfm

    asked by danica
  125. Trig

    Sin theta=8/17, theta in Quadrant I, Cos X=-sqrt5/5 in Quadrant II

    asked by Javier
  126. physics

    Identical twins, each with mass 59.6 kg, are on ice skates and at rest on a frozen lake, which may be taken as frictionless. Twin A is carrying a backpack of mass 12.0 kg. She throws it horizontally at 3.00 m/s to Twin B. Neglecting any gravity effects,

    asked by heather
  127. Algebra 1

    Solve for b 3a + 2b = c

    asked by Monica
  128. US Government

    1. What was a major contributor to the increase in problems related to health, education, housing, and other social issues? 2. As part of the admission process, delegates must be elected to draft what document? Ans: The constitution? 3. The powers of the

    asked by mysterychicken
  129. Algebra Grade 7

    a music store buys compactc discs for $12 each and sells them for $15 each. what is the percent of markup on these compact discs

    asked by rawr... im a dinosaur.... rawr
  130. american government

    Consider the following features of Congress (including some that no longer apply), and discuss the policy implications of each. Does they (a) lead to more or less logical and coherent policies? (b) lead to more or less representation of various local and

    asked by dora
  131. Algebra Grade 7

    if a furniture store buys a coffee table from a manufacturer for $120 and sells it at 100% markup, what is the selling price of the coffee table?

    asked by rawr... im a dinosaur.... rawr
  132. Physics URGENT!!!

    Gayle runs at a speed of 9.00 m/s and dives on a sled, initially at rest on the top of a frictionless, snow-covered hill, that has a vertical drop of 20.0 m. After she has descended a vertical distance of 4.00 m, her brother, who is initially at rest, hops

    asked by Anonymous
  133. Algebra Grade 7

    suppose that a car normally sells for $16,500 and is now on sale for $14000. what is the percent of discount. 17.9%??

    asked by rawr... im a dinosaur.... rawr
  134. Modern world studies

    7. The French philosopher Baron de Montesquieu believed that the power of a government __________.

    asked by kayla
  135. Physics

    Traveling at a speed of 19.3 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.620. What is the speed of the automobile after 1.46 s have elapsed?

    asked by Orla
  136. english 11

    example of situation irony in act iii of the crucible

    asked by Ella
  137. Physics

    On earth, two parts of a space probe weigh 18300 N and 4440 N. These parts are separated by a center-to-center distance of 5.11 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the

    asked by Orla
  138. Algebra Grade 7

    if a pair of shoes has an original price of $80 and they were on sale for $48, what is the percent of discount? 40%?

    asked by rawr... im a dinosaur.... rawr
  139. Ms. Sue... Thank you for your help.

    Ms. Sue, I just wanted to say thank you for your help on all y math questions today. It really helped and I greatly appreciate it. thank ya, ♥dino♥

    asked by rawr... im a dinosaur.... rawr
  140. World History Please Help ASAP Ms. Sue?

    I am doing a research paper on the opium wars in China. Any suggestions for key points for thesis statement?

    asked by Joey
  141. algebra

    A heating duct has a rectangular cross section whose area is 40(inches squared). If it is 3in longer than it is wide then what is its length and width. i need both equation and answer

    asked by danica
  142. math

    Suppose C(x) measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then the following function measures the economy's savings corresponding to an income of x billion dollars. S(x) = x - C(x) (Income

    asked by Smantha
  143. chemistry

    A cylinder with a moveable piston has a volume of 18.7 L at a pressure of 1.2 atm. What will be its volume if the pressure is increased to 1.7 atm?

    asked by Nomi
  144. history

    explain someone please policy implications of party congress; • A powerful Speaker of the House

    asked by keke
  145. physics help needed very urgent !!!

    The figure shows four penguins that are being playfully pulled along very slippery (frictionless) ice by a curator. The masses of three penguins and the tension in two of the cords are m1 = 10.5 kg, m3 = 14.7 kg, m4 = 22.05 kg, T2 = 120 N, and T4 = 236 N.

    asked by some one
  146. physics to be solved ..easy !!

    A shot putter launches a 6.910 kg shot by pushing it along a straight line of length 1.650 m and at an angle of 33.80° from the horizontal, accelerating the shot to the launch speed from its initial speed of 2.500 m/s (which is due to the athlete's

    asked by good _one_here
  147. physics is annoying

    In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the overhead view of the figure. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 227 N, and

    asked by sexy beast
  148. physics

    A 1400 kg car takes a 50 m unbanked curve at 14 m/s. What is the size of the friction force on the car?

    asked by Dominic
  149. Physics

    A 0.135 kg ball is thrown straight up from 1.94m above the ground. Its initial vertical speed is 5.60 m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.

    asked by Steeve
  150. Chemistry

    When 22.7mL of o.500 M H2SO4 is added to 22.7mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temperature rises to 30.17 degrees Celsius. Calculate the delta h of this reaction. (Assume that the total volume is the sum of

    asked by Sean
  151. english

    Josie’s project was a failure, having not prepared properly. Is it a: misplaced modifier dangling modifier correct

    asked by Deb
  152. math

    The weekly demand for the Pulsar 25 color LED television is represented by p, where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with manufacturing the Pulsar 25 is given by

    asked by Samantha
  153. english

    Henry’s desire to win is obvious. Is it a: gerund infinitive prepositional participial

    asked by Deb
  154. English

    In “Do Not Go Gentle into That Good Night,” Dylan Thomas urged his father to resist? aging. despair. quitting. death.

    asked by Deb
  155. english

    The speaker in the poem from Auden’s “The Ten Songs” is trying to flee from? police. Hitler. memories. floods.

    asked by Deb
  156. english

    How does Dante feel about the journey he’s about to take with Virgil? worse than before he talked with Virgil better now that he’s talked with Virgil unsure excited

    asked by Deb
  157. government

    How has the presidency role changed since it's inception to today? How has the public's perception of the presidency changed?

    asked by karen
  158. chemistry

    How many grams of C3H18O2 contain 7.9 e25 atoms of Carbon?

    asked by Liang
  159. physics

    You’re standing outside on a windless day when raindrops begin to fall straight down. You run for shelter at a speed of 5.2 , and you notice while you’re running that the raindrops appear to be falling at an angle of about 30 from the vertical.What’s

    asked by Anonymous
  160. Math 142

    800 hundred chances are sold at $2 apiece for a raffle. There is a grand prize of $650 dollars, two second prizes of $250, and five third prizes of $50. First calculate the expected value of the lottery. Determine if the lottery is a fair game. If the game

    asked by Nina
  161. Biology

    Explain why the pH scale stretches between the numbers 0 to 14.

    asked by Brian Ho
  162. statistics

    Given the length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation 5 feet, what is the probability he throws it between 50 feet and 60 feet?

    asked by Alex
  163. chemistry

    calculate the moles of indicated product produced when 26.0g of each reactant is used. A. 4Al+3O2---->2AlO3 (Al2O3 B. 3NO2+H2O--->2HNO3+NO (HNO3)

    asked by Liang
  164. chemistry

    What STP volume of oxygen gas is obtained from the electrolysis of 140.0mLof water? (Hint: The density of water is 1.00g/mL.)

    asked by lorpu
  165. physics

    Suppose for the nucleus of interest, the gyromagnetic ratio is ƒ× = 2.675x108 T-1 s-1 (radians is an implicit unit here) or ƒ×ƒ}ƒ¢ƒà = 42.58 MHz/T. If the applied magnetic field is 3T, determine the resonant frequency of the spins (in MHz or

    asked by Anonymous
  166. MATH

    FIND THE AREA OF A RECTANGULAR FROM MEASURING 10 INCHES BY 8 INCHES.

    asked by ROSE
  167. Math

    Suppose C(x) measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then the following function measures the economy's savings corresponding to an income of x billion dollars. S(x) = x - C(x) (Income

    asked by Samantha
  168. math

    The weekly demand for the Pulsar 25 color LED television is represented by p, where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with manufacturing the Pulsar 25 is given by

    asked by Ashley
  169. Algebra

    How do you graph x + 4y = 16

    asked by Linda
  170. Math

    How do simplify the expression (x-3)(2x-5) - (x+1)(x-6)=

    asked by Linda
  171. Physics

    In 2.0 minutes, a ski lift raises 5 skiers at constant speed to a height of 190 m. The average mass of each skier is 65 kg. What is the average power provided by the tension in the cable pulling the lift?

    asked by 4319
  172. physics

    a 1000kg car goes over the top of a hill with a radius curvature equal to 40.0m. At the top of the hill the normal force is 2,500 N. How fast is the car going?

    asked by Anonymous
  173. Physics

    A skier is traveling at a speed of 36.2 m/s when she reaches the base of a frictionless ski hill. This hill makes an angle of 15° with the horizontal. She then coasts up the hill as far as possible. What height (measured vertically above the base of the

    asked by Lily
  174. Physics

    Consider the system of blocks in the figure below, with m2 = 5.0 kg and è = 33°. If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at rest?

    asked by Lily
  175. Physics

    A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood

    asked by Lily
  176. Physics

    A car of mass 1396 kg is parked on a very slippery hillside (see figure below). To keep it from sliding down the hill (è = 15°), the owner attaches a cable. If there is no frictional force between the road and the tires, what is the tension in the cable?

    asked by Lily
  177. Physics

    Consider a plane with a velocity relative to the air of 198 m/s in a westerly direction. If the wind has a speed relative to the ground of 56 m/s (in an easterly direction), how long does it take for the plane to travel from one city to another that is due

    asked by Lily
  178. Physics

    The tightrope walker gets tired and decides to stop for a rest. During this rest period, she is in translational equilibrium. She stops at middle of the rope and finds that both sides of the rope make an angle of è = 10.00° with the horizontal. If the

    asked by Lily
  179. Physics ?_?

    The model airplane is being spun at a speed of 20 m/s on a horizontal circle of radius 17 m. The mass of the plane is 0.86 kg. The person holding the guideline pulls it in until the radius becomes 13 m. The plane speeds up, and the tension in the guideline

    asked by 4319
  180. Physics

    A common pickup for an electric guitar consists of a coil of wire around a small permanent magnet, as described in Figure 25.5. Why will this type of pickup fail with nylon strings?

    asked by norma
  181. Math

    Which Statements of congruence are true and which are false and why? 177 _= 17 871 _= 713 1322 _= 5294 5141 _= 8353 13944 _= 8919 67 x 73 _= 1 x 3 17 x 18 x 19 x 20 _= 4! 83 (144 power) _= 15 (144 power) Their not equals signs...they are three lines on top

    asked by Jimmy
  182. Math

    How many integers between 200 and 500 inclusive leave a remainder 1 when divided by 7 and a remainder 3 when divided by 4? Find the smallest positive integer that leaves a remainder 5 when divided by 7, a remainder 6 when divided by 11, and a remainder 4

    asked by Jimmy
  183. Physical Science

    Phairade roul

    asked by Anonymous
  184. MATH

    HOW MANY TIMES LONGER IS 15,000 THAN 3,750

    asked by JESSICA
  185. Math

    The diagonals of a rhombus are 16cm and 10 cm. Calculate the angles of the rhombus.

    asked by Vanessa
  186. calculus

    A cylinder is generated by rotating a rectangle with perimeter 12 in. about one of its sides.? Express the volume of the cylinder as a function of x. Find the approximate value of x that maximizes the volume. Then give the approximate maximum volume.

    asked by riri
  187. Intermidiate algebra

    a woman ivests in two bank accounts, one with a 3% percent interest and the other paying 9% simple interest per year.She puts twice as much in the lower account. Her annual interest is 7110. How much did she invest in each account?

    asked by jay
  188. simple alg 2!!!

    a=-2 b=3 |a+b|? solve

    asked by tyneisha
  189. Chemistry

    Performing the same experiment described on your lab manual, a student used a 0.358 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.102 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the

    asked by Jena
  190. math

    In a problem on percentages there are three quantities that are involved. These are the base, the amount, and the rate percent. Express the relation between them in the form of an equation and explain with examples how to find each one of them given the

    asked by cecelia
  191. Math

    I need help understanding truth tables please.

    asked by Ashley
  192. Math Statistics

    Are there any advantages or disadvantages to using data that follow a normal distribution?

    asked by Misty
  193. chemistry

    For 6.0*10^-2 M H2CO3, a weak diprotic acid, calculate the following values. Use ionization constants of H2CO3: Ka1=4.4*10^-7, Ka2=4.7*10^-11, as necessary. PART A: [H3O^+] M PART B: [HCO3^-] M PART C: [CO3^2-] M

    asked by aliceallyx3
  194. anth

    Describe how scientific racialism was manifest in legislation, court decisions, and US policies between 1850 and 1924 that include immigration restriction from Europe and Asia.

    asked by Anonymous
  195. math

    In a problem on percentages there are three quantities that are involved. These are the base, the amount, and the rate percent. Express the relation between them in the form of an equation and explain with examples how to find each one of them given the

    asked by cecelia
  196. Math Statistics

    The table below shows Rico’s grades during the third term in four subjects. Subject Units Grade Math 1.5 98 Science 2 97 English 1.5 95 A.P. 1 99 What was Rico’s average grade in the four subjects?

    asked by Milen
  197. chemistry

    how to find ph of aqueous solution if your only given the concentration

    asked by aliceallyx3
  198. physics

    After you pick up a spare, your bowling ball rolls without slipping back toward the ball rack with a linear speed of v = 3.27 m/s To reach the rack, the ball rolls up a ramp that rises through a vertical distance of h = 0.572 m. What is the linear speed of

    asked by Emily