1. Physics

    A gas is kept at a pressure of 4.00 × 105 Pa and a temperature of 30.0 °C. When the pressure is reduced to 3.00 × 105 Pa and the temperature raised to 40.0 °C, the volume is measured to be 0.45 × 10^−4 m^3. Estimate the original volume of the gas. I

    asked by Angel on November 17, 2017
  2. social studies

    Treasure claims that her 6-month-old baby, Precious, can add and subtract small numbers of objects. Recent research on infants' understanding of numbers would: A. indicate that Treasure is nuts. B. prove that Precious can add and subtract up to 20 objects.

    asked by clara on October 6, 2012
  3. MATH

    Many people are interested in losing weight through exercise. An important fact to consider is that a person needs to burn off 3,500 calories more than he or she takes in to lose 1 pound, according to the American Dietetic Association. The following table

    asked by P on September 26, 2009
  4. math

    Many people are interested in losing weight through exercise. An important fact to consider is that a person needs to burn off 3,500 calories more than he or she takes in to lose 1 pound, according to the American Dietetic Association. The following table

    asked by p on September 26, 2009
  5. Algebra

    The time, t, required to drive a certain distance varies inversely with the speed, r. If it takes 7 hours to drive the distance at 55 miles per hour, how long will it take to drive the same distance at 65 miles per hour? • about 6.25 hours • about

    asked by Sandra on May 4, 2014
  6. Chemistry Damon step bystep for me

    A 0.887g sample of a mixture of nacl and kcl is dissolved in water and the solution is treated with an excess of agn03 producing 1.822g of agcl. What is the percent by mas of each compound in the mixture My calculation 1.822g/143g/mol = 0.013M x/58 + y/74

    asked by Ken Hung on January 12, 2014
  7. chemistry

    what experimental difficulty would you encounter if you had neglected to include a drying step before evaporating the ether solution of the neutral organic compound? Water was added to the organic solvent ,but a drying agent wasn't added. So would the

    asked by jason on November 9, 2008
  8. Chemistry

    A metal, , of atomic weight 96 reacts with fluorine to form a salt that can be represented as . In order to determine and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.18- sample of the salt is dissolved in 100.0

    asked by Robin on February 20, 2011
  9. Chemistry

    The solubility of sodium chloride is 35.9 g/100 g H2O at 20°C. 35.9 g of sodium chloride are added to 100 g of water, and all of it dissolves. Another solution is made from the same amount of salt and the same amount of water. This time some solid remains

    asked by Amanda Perry on June 24, 2016
  10. Chemistry

    A sample of impure magnesium was analyzed by allowing it to react with excess HCl solution: Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) After 1.27 g of the impure metal was treated with 0.100 L of 0.768 M HCl, 0.0125 mol HCl remained. Assuming the impurities

    asked by James on September 22, 2013
  11. Chemistry

    The standardized NaOH solution was determined to be 120M whereas the mass of the sample of impure tartaric acid was 1.35g. If the initial reading of the buret volume changed from 48 ml to a final reading of 17 ml at the endpoint of the titration of the

    asked by Jonah on February 28, 2013
  12. Chemistry

    A metal, , of atomic weight 96 reacts with fluorine to form a salt that can be represented as . In order to determine and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.18- sample of the salt is dissolved in 100.0

    asked by Robin on February 20, 2011
  13. Psychology

    Jennifer is a 29-year-old administrative assistant married to Antonio, an Italian engineer, whom Jennifer met four years earlier while on a business trip for her marketing company. The couple now lives in Nebraska, where Antonio works for the county's

    asked by Brittney on January 24, 2009
  14. Physics Classical Mechanics

    The mean distance from the center of the earth to the center of the moon is rem = 3.84 × 108 m. The mass of the earth is me = 5.98 × 1024 kg and the mass of the moon is mm = 7.34 × 1022 kg. The mean radius of the earth is re = 6.37 × 106 m. The mean

    asked by Anonymous on October 28, 2013
  15. physics

    You jog at 9.5 km/h for 7.0km , then you jump into a car and drive an additional 16km . With what average speed must you drive your car if your average speed for the entire 23km is to be 22 km/h? Work: i tried setting up a proportion and setting it to each

    asked by Zara on August 12, 2014
  16. Physics

    A boat with a horizontal tow rope pulls a water skier. She skies off to the side, so the rope makes an angle of 15.0° with her direction of motion, but in the same direction as the boat is traveling. The tension in the rope is 160 N. How much work is done

    asked by Anonymous on September 13, 2012
  17. physics

    A baseball of mass 250g, pitched with a speed of 40m/s, is caught by a catcher, whose glove moves backward 0.25m while stopping the ball. a)what is the kenetic energy of the ball? b)how much work did the catcher's glove do on the ball? c) what was the

    asked by Alemu on December 3, 2009
  18. English Writing

    The explain in one paragraph for each website why you think the website is good for academic work. Structure: Topic sentence 2-3 reasons why it is good or bad, or a little of both. Concluding sentence. Make sure to use the evaluative word "because" in your

    asked by Chris on October 23, 2016
  19. Physics

    A 200-kg cart is pushed slowly up an incline. How much work does the pushing force do in moving the cart up to a platform 1.5 m above the starting point if friction is negligible? (Use above problem) If the distance along the incline to the platform is 7 m

    asked by BNC on January 30, 2012
  20. English 2

    Need help with this-- Create an imaginary dialogue between Laotzu and a contemporary high school student in which the student asks for the philosopher's advice. Focus the dialogue on a concrete situation involving school, work, or relationships, and be

    asked by mysterychicken on October 9, 2010
  21. heat

    a silver bar 0.125 meter long is subjected to a temperture change from 200 degree celsius to 100 degree celsius. What will be the lenght of the bar after the temperture change? I will be happy to critique your thinking and/or work on this question. Please

    asked by stacy on August 27, 2005
  22. Physics

    Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. Find the total work done on the gas if it follows the constant temperature path A-C followed by the constant pressure path C-D. A = 2atm and

    asked by Dan on December 6, 2010
  23. Physics

    Water skiers often ride to one side of the center line of a boat, as shown in the figure. In this case, the ski boat is traveling at 15 m/s and the tension in the rope is 90 N. If the boat does 3500 J of work on the skier in 42.4 m, what is the angle θ

    asked by kidincoll3ge on October 11, 2011
  24. math

    a. The formula for the velocity of an object is , where v is the velocity of the object, d is the distance traveled, and t is the time elapsed while that distance is traveled. If you had only this formula to work with, what should your first step be in

    asked by kerrica on August 26, 2014
  25. algebra

    you give me the answer but didn't really tell me how you did it so i can figure how to find the other numbers giving. also was just respneding that the problem was true as you said it made nosense. evaluate each function for the value specified. evaluate

    asked by clueless on May 18, 2007
  26. Physics

    You are unloading a refrigerator from a delivery van. The ramp on the van is 5.0m long and its top end is 1.4m above the ground. As the refrigerator moves down the ramp, you are on the downside of the ramp trying to slow the motion by pushing horizontally

    asked by Dane on November 20, 2014
  27. Physics

    An unknown potential difference exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. If 2.5 x 10-20 J of work is needed to eject a positive Calcium ion (Ca2+) from the interior

    asked by Susie on February 24, 2010
  28. ENGLISH

    How to do this......please show me.... Take 2 A4 sheet.On one write PROPER NOUNS and stick related picture cut outs.On the 2nd sheet write COMMON NOUNS and paste related picture cut outs.

    asked by laly on August 22, 2013
  29. economics

    An electronics company advertises that the battery life of its new smart phone with normal usage averages 72 hours. The company says this is one of the desirable characteristics of the phone which makes the phone a better choice compared to competitor

    asked by miguel on September 8, 2014
  30. economics (7)

    An electronics company advertises that the battery life of its new smart phone with normal usage averages 72 hours. The company says this is one of the desirable characteristics of the phone which makes the phone a better choice compared to competitor

    asked by miguel on September 8, 2014
  31. economics 7

    An electronics company advertises that the battery life of its new smart phone with normal usage averages 72 hours. The company says this is one of the desirable characteristics of the phone which makes the phone a better choice compared to competitor

    asked by Mia on September 7, 2014
  32. math

    Write and solve an equation to model the situation: two friends are renting an apartment. they pay the landlord the first months rent. the landlord also requires them to pay an additional half of a month's rent for a security deposit. the total amount they

    asked by j on September 16, 2010
  33. Trigonometry

    Find the general solution of the following equation. sin (5x) = cos (3x) sin (6x) sin (x) = cos (3x) cos (4x) Thanks for your help :)

    asked by Tommy on July 22, 2008
  34. Calculus

    Find d/dx integral(with upper bound of 4x and lower bound of 1) of square root of t^2 +1 dt. A. sqrt(4x+1) B. sqrt(16x^2+1) + sqrt(2) C. 4 sqrt(16x^2+1) D. sqrt(16x^2+1)

    asked by Justin on July 8, 2019
  35. biology

    What connections can you identify between the metric units for length and volume length x length x length = cubic length. That is cm x cm x cm = cubic centimeters or m x m x m = cubic meters. That is length used to measure the sides will provide a volume.

    asked by wow on September 25, 2006
  36. history

    Describe Gouverneur Morris's early childhood uprising? "uprising"??? Do you mean "upbringing"? Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's

    asked by Mack on April 12, 2007
  37. History

    "He that will not work, shall not eat." Which problem of colonial America is John Smith addressing in this statement? -Arriving colonists focused most of their time on finding gold. -Indentured servants and slaves often rebelled against their unfair

    asked by Amy on October 2, 2014
  38. Chemistry

    The Cu2+ ion can be separated from Ag+, Ca2+, and K+ in aqueous solution by 1. precipitation of Cu2+ as Cu(OH)2(s) with 6 M NaOH(aq). 2. precipitation of Ag+, Ca2+, and K+ as the carbonates. 3. None of these procedures will separate Cu2+ from the other

    asked by Christina on April 5, 2010
  39. English

    1. Part A How is this expert of an expository essay organized? A) cause and effect B) compare and contrast C) problem and solution D) chronological order Part B Which paragraph from the excerpt best shows how the essay is organized? A) Paragraph 2 B)

    asked by Koala on December 7, 2018
  40. physics

    1. A man pulls a crate with a rope. The crate slides along the floor in the horizontal direction (x direction). The man exerts a force of 50 N on the rope, and the rope is at an angle q. Describe how the force components (Fx, Fy) change as the angle

    asked by Ashley on November 20, 2013
  41. Physics

    During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s. How much power must be produced by the "active Na^+ pumping" system to produce this flow against a +30-mV potential difference? Assume that the axon is 40cm long

    asked by John on February 12, 2013
  42. Physics

    A wave solution to Maxwell's Equations is given by E⃗ =E0xˆcos(5.0 z)cos( 1.03e11 t) where z is measured in centimeters and t in seconds. (a) What is the wavelength (in rad/meter) of the wave? (b) What is the index of refraction, n, of the medium? (c)

    asked by amit sharma on May 8, 2013
  43. Chemistry Lab

    When 0.671 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 109C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

    asked by Shawn on February 11, 2011
  44. chemistry

    When 0.767 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 125C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

    asked by Kelly on February 21, 2010
  45. CHEMISTRY

    When 0.756 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 123C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

    asked by Anonymous on February 24, 2008
  46. Chemistry

    When 0.689 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 112C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

    asked by Adam on February 19, 2010
  47. chemistry

    When 0.667 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 108C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

    asked by blasting on February 13, 2010
  48. Physics Please help3

    A point charge with charge q1 = 3.10μC is held stationary at the origin. A second point charge with charge q2 = -4.60μC moves from the point ( 0.160m , 0) to the point ( 0.270m , 0.255m ). How much work W is done by the electric force on the moving point

    asked by Josh on May 21, 2014
  49. English

    34.1 Revise the following sentences to eliminate unnecessary shifts in tense, mood, voice, or person and number and between direct and indirect discourse. 1. The greed of the 1980s gave way to the occupational insecurity of the 1990s, which in turn gives

    asked by Sandy on September 2, 2014
  50. Math

    In physics, one learns that the height of an object thrown upward from an initial height of h0 feet with an initial velocity of v0 (in feet per second) is given by the formula h(t)=−16t^2+v0t+h0 feet where t is the amount of time in seconds after the

    asked by Anonymous on October 24, 2016
  51. physics

    a gas is filled in a vessel at 27 degree Celsius. to what temp should it be heated so that it 1/3rd of of the gas escapes out of the vessel? my attempt to solve; i tried applying charles law. so, V1/V2= T1/T2. V2= V1+V1/3= 4V1/3 hence, applying charles law

    asked by saumya on July 19, 2015
  52. precalculus

    I don't understand what steps I have to do in order to solve this problem. An angle's rays cut off an arc length of 227 centimeters in a circle with a 40 centimeter radius. A. What portion of the circle's circumference is cut off by this angle? B. What is

    asked by Keira on November 22, 2016
  53. Algebra

    I am not sure how to solve this problem. Could someone please help and explain the proper steps. Determine the annual net cost if the Annual interest of 2.5% is paid if the balance exceeds $750, $8 monthly fee if the account falls below minimum balance

    asked by Tricia on August 6, 2013
  54. chemistry step by step for me Bob

    A sample of peanut oil weighing 2g is added to 25ml of 0.4M koh. After saponification is complete, 8.5ml of 0.28M hes04 is needed to neutralize excess of koh. The saponification number of peanut oil. The right answer 146.75 Bob solve it for me step by step

    asked by ken on July 4, 2014
  55. chemistry - kinetics

    The activation energy for the isomerization of methyl isonitrile is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that have an energy of 160 or greater at 500 K? 510 K? What is the ratio of the fraction at 510K to that at 500K? I missed

    asked by Mark on March 6, 2007
  56. Physics...Friction

    A 75 kg box slides down a 25 degree ramp with an acc. of 3.6 m/s2. find mu,k between the box and the ramp. Write down Newton's second law for the direction of motion. "a" is the acceleration. Mg sin 25 - M g cos 25 *mu,k = M a The first term is the weight

    asked by Christy on February 24, 2007
  57. Intermediate Accounting

    E6-5 Mike Finley wishes to become a millionaire. His money market fund has a balance of $92,296 and has a guarateed interest rate of 10%. How many years must Mike leave that balance in the fund in order to get his disired $1,000,000? I am getting $9,229.60

    asked by Lori on January 30, 2011
  58. Chemistry

    Find the mass of water (H2O) needed to react with 150 grams of potassium (K) 2K(s) + 2 H2O (g)-2KOH +H2(g) How do I get the number of moles in H2O? Desperate to understand this. I got K= 150g./39.0983=3.84 mols of K. Then would it be 3.84(2mols H2O/7.68)

    asked by Teresa on October 27, 2014
  59. Physics

    A 153 g bullet is fired from a rifle having a barrel 0.794 m long. Assuming the origin is placed where the bullet begins to move, the force exerted on the bullet by the expanding gas is F = a + bx − cx^2 , where a = 12600 N, b = 8420 N/m, c = 10100

    asked by Justin on November 18, 2013
  60. Physics

    A 153 g bullet is fired from a rifle having a barrel 0 . 794 m long. Assuming the origin is placed where the bullet begins to move, the force exerted on the bullet by the expanding gas is F = a + bx − cx 2 , where a = 12600 N, b = 8420 N / m, c = 10100 N

    asked by Justin on November 15, 2013
  61. Algebra

    This question never got answered and I would appreciate it if someone could take a look at it. Simplify 12(6^/(5^-4^) + 7 My thoughts 12(36/(5^-4^) + 7 12(36/9) + 7 12 (4) + 7 12 * 11 132 Algebra - Steve, Saturday, August 23, 2014 at 11:49pm Your notation

    asked by Faye on August 24, 2014
  62. Chemistry

    Given the following equation and information answer the following questions, KHC8H4O4 (aq) + NaOH(aq) > KNaC8H4O4 (aq) + H2O(l) 3. What is the molarity of a NaOH solution if 26.50 mL of it is required to neutralize 0.4150 g of pure KHP? (3 points) 4. What

    asked by Yassine on March 10, 2018
  63. Chemistry

    A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCl, no precipitate formed. The pH was lowered to about 1 and H2S was bubbled through the solution. No precipitate

    asked by Neeta on April 10, 2014
  64. Government

    Political Parties have organizations at the a) state level. b) national level c) local level. d) all of the above I think it d America utilizes a three party system comprised of the Democratic Party, Republican Party, and Green Party. a)true b) false I

    asked by J on July 24, 2014
  65. english-poetry

    what would you say this poem is about THE CAROL BURNETT SHOW by Joan Jobe Smith After my father died and I had to drop out of college for the second time to go back to being a go-go girl, my mother came to live with me to take care of my kids although she

    asked by deb on October 9, 2011
  66. statistic

    3. In studying the efficiency of the federal court system, we look at the random variable, X, the amount of time elapsing between the filing of a charge and the trial date. A random sample of n = 86 cases yields a sample mean of 11.4 months, with sample

    asked by Tian on January 30, 2011
  67. Algebra

    Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help

    asked by Meghan on February 24, 2010
  68. algebra

    While working at The Nut House you are asked to make a mixture of raisins and nuts worth $2.75/lb. You have 12 pounds of raisins worth $1.25/lb. How many pounds of nuts worth $4.00/lb should you add to the raisins to get the right-priced mix? I have no

    asked by Loretta on April 15, 2011
  69. Algebra

    Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help

    asked by Meghan on February 24, 2010
  70. Math Help Please

    Bob invested $30,000, part at 10% and part at 1%. If the total interest at the end of the year is $1,560, how much did he invest at 10%? Let x be the amount invested at 10%. Then, 30,000-x is invested at 1% 0.1 x + 0.01 (30,000 - x) = 1560 Solve that

    asked by Carol on June 24, 2007
  71. algebra

    logarithms Solve the following equations 3^x-2=6 Add 2 to both sides of the equation to start. Whatever operation you do to one side of an equation you must do to the other side as well. 3^x - 2 + 2 = 6 + 2 3^x = 8 Changing to logs: log 3^x = log 8 x log 3

    asked by Dee Williams on November 9, 2006
  72. Precalc/Trig

    2 roads intersect at an angle of 60 degrees. A friend's mail box is 434 feet from that intersection and your mailbox is on the other road and is 525 feet from the intersection. How far is it from your mailbox to your friend's mailbox? I got 1016.66 feet,

    asked by Heather on December 4, 2014
  73. Math

    If Katrina leaves now and drives 66km/h, she will reach Alton just in time for her appointment. On the other hand, if she has lunch first and leaves in 40 minutes, she will have to drive 90km/h to make her appointment. How far away is Alton? How would you

    asked by Logan on November 6, 2008
  74. physics

    A 12801 kg freight train, coasting at 19 m/s, strikes a stationary 2445 kg box car. Determine the "CHANGE IN MOMENTUM" for the freight train if the freight train and the box car couple together. Hint: Draw an "IF Chart" to solve. i got -39005.01

    asked by Zach on April 9, 2018
  75. Physics

    Two 10 cm diameter charged rings face each other, 20 cm apart. The left ring is charged to -20 nC and the right ring is charged to +20 nC. What is the force on a 1.2 nC charge placed at the midpoint? I have already calculated the electric field between the

    asked by David D. on September 3, 2010
  76. Chemistry

    The element rubidium has bcc packing with a body-centered cubic unit cell. The density of Rb is 1530 kg/m3. Calculate the volume (L) of the unit cell of rubidium. Molar mass of Rb=85.468. Since it is bcc, it would have 2 atoms/unit cell. Can you please

    asked by Sidney Ngo on February 8, 2017
  77. Physics

    A 2285 kg freight train, coasting at 13 m/s, strikes a stationary 2465 kg box car. Determine the "CHANGE IN VELOCITY" for the freight train if the freight train and the box car couple together. Hint: Draw an "IF Chart" to solve. answer please

    asked by Anonymous on April 8, 2018
  78. physics

    A rock is tossed straight up with a speed of 29m/s. When it returns, it falls into a hole 13m deep. Solve for rock's velocity as it hits the bottom of the hole. &How long is the rock in the air, from the instant it is released until it hits the bottom of

    asked by Amanda on June 12, 2012
  79. Math

    HELP! I have a math question the says this: In track practice, Jesse ran a mile in 7 minutes. His mile time was 2 1/2 minutes faster than Michael's time. Write and solve an equation to calculate Michael's mile time. I can't figure out what to do and it's

    asked by Lizzy on November 11, 2012
  80. physics

    A 25 kg box slides, from rest, down a 9-m-long incline making an angle 15 degrees with the horizontal. The speed of the box when it reaches the bottom of the incline is 2.40 m/s. (a) What is the coefficient of kinetic friction between the box and the

    asked by Sandhya on June 13, 2010
  81. Social studies 7

    Homework Help: SS Help Posted by I like Cats on Thursday, October 6, 2016 at 12:47pm. 1. The U.S. Constitution calls for how many branches of government? A. two B. three •• C. Four D. Five 2. Which of the following responsibilities are held by the

    asked by Hills on October 14, 2016
  82. Harmonics Problem--please help!

    A violin string has a length of 0.350 m and is tuned to concert G, with f = 392 Hz. Where must the violinist place her finger to play concert A, with f = 430 Hz? If this position is to remain correct to half the width of a finger (that is, to within 0.600

    asked by bre on April 23, 2010
  83. Harmonics Problem--please help!

    A violin string has a length of 0.350 m and is tuned to concert G, with f = 392 Hz. Where must the violinist place her finger to play concert A, with f = 430 Hz? If this position is to remain correct to half the width of a finger (that is, to within 0.600

    asked by bre on April 23, 2010
  84. Geometry

    A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. What is the ground speed of the plane? 2. When you solve the triangle, what is the smallest angle? 3. What is the largest angle of the triangle? 4. What is the remaining angle? 5.

    asked by Amber on June 5, 2012
  85. Math: Word Problem

    A ball is thrown upward from the top of a building which is 96ft tall w/ Initial velocity of 80 ft per sec. Distance s(ft) of ball from the ground after t sec is s=96+80t-16t^(2) 1) how many sec. will the ball pass the top of the building when it is coming

    asked by Amy~ on September 7, 2010
  86. Word Problem

    A reservation clerk worked 15.3 hours one day. She spent twice as much time entering new reservations as she did verifying old ones and one and a half as much time calling to confirm reservations as verifying old ones. How much time did she spend entering

    asked by Rene on January 17, 2010
  87. Physics

    A golf ball released from a height of 1.80 m above a concrete floor, bounces back to a height of 1.06 m. If the ball is in contact with the floor for 4.62 ms, what is the magnitude of the average acceleration a of the ball while it is in contact with the

    asked by Lindsay on October 4, 2007
  88. physics

    A 2285 kg freight train, coasting at 13 m/s, strikes a stationary 2465 kg box car. Determine the "CHANGE IN VELOCITY" for the freight train if the freight train and the box car couple together. Hint: Draw an "IF Chart" to solve.

    asked by Zach on April 9, 2018
  89. Math

    Using the Fundamental Theorem of Calculus solve: F(x)= ∫ Cos(t^2) + t dt on interval [x to 2] FTC = [∫f(x)]' on interval [0 to x] Switching a and b change the sign of the function, since we want to x to be the upper bound, then we exchanged the t terms

    asked by Celine on April 21, 2019
  90. economics

    Assume that the demand for gasoline is inelastic. The government imposes a sales tax on gasoline. The tax revenue is used to fund research into clean fuel alternatives to gasoline, which will improve the air we all breathe. a. Who bears more of the excess

    asked by laila on November 18, 2008
  91. microeconomics

    An october 24, 1996 article in the washington post dicussses the completion of a new private toll road between leesburg and washington dulles international airport. It states that daily revenue from tolls increased from $14000 to 22000 when the price to of

    asked by Kim on February 21, 2007
  92. english

    Is this text correct? Chinese new year The chinese people celebrate new years eve in the first new moon of Febraury,it changes every year, it takes two weeks, from the new moon to the full moon, people wear red clothes in new year, they bring good luck in

    asked by Kate on November 21, 2007
  93. Math

    Hello. I'm not asking for you to give me the answer to this question, but could you please help me? Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled 1 to 6 and hope she gets a

    asked by TreatPPLHowUWant2BTreated on March 5, 2019
  94. Help on Social Studies please!

    Part A: What is the basic independent unit of world politics? a. country b. province c. nation *** d. organization Part B: Which of the following groups is an example of the basic unit you selected in the previous question? a. people who share a common

    asked by Eva on October 26, 2016
  95. Physics

    A lobsterman’s buoy is a solid wooden cylinder of radius r and mass M. It is weighted at one end so that it floats upright in calm sea water, having density. A passing shark tugs on the slack rope mooring the buoy to a lobster trap, pulling the buoy down

    asked by Rachel on January 29, 2015
  96. Algebra Part II

    The local radio station is giving away some tickets to the circus. Adult tickets cost the station $8 each while children’s tickets cost $6. The station wants to spend no more than $172. Let x = the number of adult tickets and y = the number of

    asked by Chris Chambers on January 9, 2014
  97. Mathematical Applications

    For the life of me, I cannot understand this question! Will someoe please help me, explain to me how I can solve it, PLEASE! Q- a party supplies store recorded net sles of $423,400 for he year.The store's beginnng iventory at retail was $105,850 andits

    asked by Alyssa on August 28, 2011
  98. College Physic

    The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 9.58 s, at which time it is turning at 3.89 rev/s. At this point, the person doing the laundry opens the lid, and a safety switch turns off the washer.

    asked by Kevin Ngu on November 4, 2012
  99. Spanish- SraJMcGin

    Posted by Aubrey on Monday, June 4, 2007 at 2:49pm. download mp3 free instrumental remix I am having troubles translating these sentences. 1.) Were the princesses singing? 2.) Did the queen used to cry? 3.) Do they like to sing? 4.) Doesn't the duchess

    asked by Aubrey on June 4, 2007
  100. physics

    water skiers often ride to one side of the center line of a boat, as shown 7-14. In this case, the ski boat is traveling at 15m/s and the tension in the rope is 80 n. If the boat does 3400 J of work on the skier in 50.3 m, what is the angle (theta) between

    asked by woody on February 5, 2013

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