Popular questions and responses by paul

    A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.15×10−23 kg . m/s and 5.19×10−23 kg . m/s, respectively. 1.)What is the magnitude of

    asked on November 20, 2011
  2. Math

    The Acme Candy Company claims that 60% of the jawbreakers it produces weigh more than .4 ounces. Suppose that 800 jawbreakers are selected at random form the production lines. Would it be unusual for this sample of 800 to contain 386 jawbreakers that weigh

    asked on October 3, 2013
  3. Chem

    How do I Balance the equation. HC2H3O2(aq)+Ca(OH)2(aq)→H2O(l)+Ca(C2H3O2)2(aq)

    asked on August 16, 2013
  4. maths

    iam a 3 digit number. my tens digit is five more than my ones digit. my hundreds digit is eight less than my tens. what number am i?

    asked on February 17, 2018
  5. Physics

    How long would it take a kettle with a 1kW heating element to heat 1 litre of water? Watts = Joules / second • Mass of 1 litre of water = 1kg • 1 kW = 1 k Joule / second or 1000 joules/ second • 1g of water needs 4.184J to raise the temperature by

    asked on December 15, 2010
  6. english grammar

    1. Our high school would not ________until mid September mid-september mid-September . a. reopen b. re-open c. re open I think the answer is B 2. We were enjoying our break by indulging in ______activities a. childlike b. child-like c. child like I think

    asked on April 20, 2017
  7. Finance

    The stock price of Webber Co. is $68. Investors require an 11 percent rate of return on similar stocks. Required: If the company plans to pay a dividend of $3.85 next year, what growth rate is expected for the company’s stock price?

    asked on March 10, 2014
  8. english

    Which phrase or sentence in this excerpt from Kurt Vonnegut's "Report on the Barnhouse Effect" demonstrates the use of irony? One long bench had been brought in for the ten of us privileged to watch. The television screens showed, from left to right, the

    asked on April 20, 2017
  9. calculus

    a ladder 10m long is leaning against a vertical wall with its other end on the ground. the top end of the ladder is sliding down the wall , when the top end is 6m from the ground it is sliding down at 2m/sec. how fast is the bottom moving away from the

    asked on September 22, 2016
  10. Trigonometry

    a flagpole 25 feet tall stands on a top of a building. from a point in the same horizontal plane with the base of the building. The angle of elevation of the top and the bottom are 61°30' and 56°20' respectively. How high is the building?

    asked on July 11, 2013
  11. Math

    A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4°C to a final temperature of 65°C. The steam enters the heat exchanger as 50% quality steam and exits as water condensate at

    asked on February 17, 2013
  12. physics

    During takeoff, an airplane, climbs with a speed of 180 m/s at an angle of 34º above the horizontal. The sun is shining directly overhead. How fast is the shadow of the plane moving along the ground? (That is, what is the magnitude of the horizontal

    asked on September 20, 2013
  13. biology

    compare and contrast the variety of amino acids with that of monosaccharides and fatty acids. Which group exhibits the greatest structural variability?

    asked on February 11, 2010
  14. physics

    A rocket is fired in deep space, where gravity is negligible. In the first second it ejects 1/160 of its mass as exhaust gas and has an acceleration of 15.1 m/s^2.What is the speed v_gas of the exhaust gas relative to the rocket?

    asked on November 14, 2011

    the height of the upper falls at Yellowstone falls is 33.2m. when the water reaches the botton of the falls, its speed is 25.8 m/s. neglecting air resistance, what is the speed of the water at the to of te falls.

    asked on November 15, 2010
  16. Physics

    A system consisting of two fixed and two movable pulleys has a mechanical advantage of 4.00. If a force of 124 N is exerted, which weight can be raised?

    asked on May 19, 2013
  17. Physics

    Two identical spheres with charges 8 and -4 microcoulomb. What's the charge on each after they are touched and separated ?

    asked on February 22, 2020
  18. Physics

    Calculate the magnitude of the potential difference between points a and b in the figure if R1=2.36 Ù, R2=4.29 Ù,and R3=10.08 Ù.

    asked on February 17, 2011
  19. math

    One-half of a number plus three-fourths of the number is 2 more than four-thirds of the number. find the number .

    asked on August 21, 2016
  20. PrimaryMatheMatics 4A textbook

    3000 Exercise books are arranged into 3 piles.The first pile has 10 more books than the second pile.The Number of books in the second pile is twice the number of books in the third pile.How Many books are there in the third pile?

    asked on December 22, 2015
  21. chemistry

    The specific heat capacity of iron is 0.45 j/g oC. how many joules of energy are needed to warm 1.3100000000000001 g of iron from 20.00oC to 29.00 oC ?

    asked on October 6, 2018
  22. Chemistry

    Kb for aniline is 4.3 x 10^-10. What does this tell you about aniline? Please help!

    asked on March 14, 2010
  23. math

    50 people purchase raffle tickets 3 winning tickets are selected at random if the first prize is $1,000, second prize is $500, and third prize is $100 in how many different ways can the prizes be awarded and is this a permutations or a combinations

    asked on May 7, 2016
  24. PSY/410

    Will someone please check my answer please. Thanks in advance. Match the definitions to the correct theoretical model. 1. ___J__ Experiences as a child affect life. Child is influenced by caretaker but also has a part in development. 2. __F___ 2–3 years

    asked on July 9, 2014
  25. financial accounding

    unexpired insurance at the end of the fiscal period represents; an accrued asset, an accrued liability, an accrued expense, or a deferred expense?

    asked on September 21, 2008
  26. Physics (Momentum and collusion)

    Two balls of equal mass undergo a collision. Ball one is initially travelling horizontally with a speed of 10 m/s, ball two is initially at rest. After the collision, ball one moves away with a velocity of 4.7 m/s at an angle of 60 degrees from it's

    asked on September 6, 2016
  27. Finance

    Anderson International Limited is evaluating a project in Erewhon. The project will create the following cash flows: Year Cash Flow 0 –$690,000 1 243,000 2 175,000 3 256,000 4 231,000 All cash flows will occur in Erewhon and are expressed in dollars. In

    asked on March 19, 2014
  28. chemistry

    The equation for the reaction between hydrogen gas and oxygen gas is: 2H2(g) + O2(g) ---> 2H2O(l) i) How much hydrogen will react with 8g of oxygen? ii) how much water will be formed when 6g of hydrogen react? i would appreciate your help.

    asked on October 17, 2010
  29. physics

    A bicycle is rolling down a circular portion of a path; this portion of the path has a radius of 8.73 m. As the drawing illustrates, the angular displacement of the bicycle is θ = 0.979 rad. What is the angle (in radians) through which each bicycle wheel

    asked on August 5, 2015
  30. Math

    Bacteria A has an initial population of 500 and doubles everyday. Bacteria B has an initial population of 50 and triples everyday. How long will it take the population of bacteria B to overtake the population of bacteria A

    asked on October 27, 2013
  31. Statistics

    The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Perform an F test and determine if the price and the number of flash drives sold

    asked on April 29, 2012
  32. math

    in a class of 28 sixth graders , all but one of the students are 12 years old. which two data measurements are the same for the student's ages? What are those measurements?

    asked on August 10, 2011
  33. physic

    by how many newtons do you increase the weight of your car when you fill up your 11.5 gal gas tank with gasoline a gallon is equal to 3.788 L and the density of gasoline is 737kg/m3

    asked on July 20, 2010
  34. managerial economics

    1. Some games of strategy are cooperative. One example is deciding which side of the road to drive on. It doesn’t matter which side it is as long as everyone chooses the same side. Otherwise, everyone may get hurt. Driver 2 Left Right Driver 1 Left 0,0

    asked on May 17, 2010
  35. chemistry

    Net Ionic equations for.. 1. Co(NO3)2 + NH3 --> ?? 2. Cu(NO3)2 + NH3 --> ?? 3. Ni(NO3)2 + NH3 --> ?? I can balance equations, I just don't know what goes on the products side.

    asked on July 15, 2009
  36. Chemistry

    Aspirin can be prepared by the reaction of salicylic acid with an excess of acetic anhydride, using phosphoric acid as a catalyst. Once the aspirin is formed, it is precipitated from the reaction mixture by adding water and filtering. The solid aspirin

    asked on April 2, 2009
  37. Mathematics

    Vinny is 5years older than his sister Lucy. Lucy is y years old now. Write an expression to show the sum of their ages in 10years to come.

    asked on June 15, 2020
  38. Math

    Make h the subject of the formula A=πr²tπr√h²+r²

    asked on November 7, 2019
  39. english

    Because he was bourgeois coddled despotic _______ as a child, Rob was a rather self-centered teenager. dubious coddled despotic bourgeois 2.After hearing the raucous, cheering response to Adam’s speech, Mr. James feared that his new student body

    asked on April 20, 2017
  40. Introductory Algebra

    the length of a rectangle is 7 meters more than twice the width. the perimeter is 68 meters. solve for length and width. I need this step by step using the blueprint...please.

    asked on February 11, 2015
  41. Literature

    If you consider The Call of the Wild to be an allegory, which one of the following statements would be true? A. The book is a story about the need for socialism. B. Judge Miller represents the primordial condition. C. John Thornton represents the civilized

    asked on March 23, 2013
  42. Chemistry

    Name the organic product of the following nucleophilic substitution reaction. OH+CH3CH2I

    asked on March 20, 2013
  43. Chemistry

    At T = 25 degrees Celsius, the reaction No2 2NO +O2 has an equilibrium constant K=5.0*10^-13. Suppose the container is filled with NO2 at an initial pressure of 0.25 atm. Calculate the partial pressure of NO at equilibrium

    asked on November 29, 2012
  44. chemistry

    The equation for the reaction between hydrogen gas and oxygen gas is: 2H2(g) + O2(g) ---> 2H2O(l) i) How much hydrogen will react with 8g of oxygen? ii) how much water will be formed when 6g of hydrogen react? i would appreciate your help.

    asked on October 17, 2010
  45. psychology

    Should your boss ask you how to be a better leader and manager, what might you take from this material and suggest to him/her?

    asked on October 13, 2010
  46. physic

    The resistivity of gold is at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14 cm long, carries a current of 480 ma. The power dissipated in the wire is closest to:

    asked on August 4, 2010
  47. physics

    A steel ball has a mass of 4.0kg and rolls along a smooth, level surface at 62m/s. A) Find its kinetic energy(i got this and its 7688 joules) B)?????-At first, the ball was at rest on the surface. A constant force acted on it through a distance of 22

    asked on November 22, 2008
  48. Chemistry

    0.50 M HI with 0.10 M KOH pH at equivalence point? I had another problem like this and I tried to do it the same way b/c I thought that was the right thing to do but it seems as if its not? Can you help? HI + KOH ==> KI + H2O. At the equivalence point we

    asked on April 2, 2007
  49. chemistry

    0.43g limestone and 98cm3 of carbon dioxide are produced on reaction with excess hydrochloric acid. How much calcium carbonate is present?

    asked on April 22, 2018
  50. physics

    microwaves with a wavelength of 15.0 cm strike a slit. What is the maximum slit width that will still result in a large amount of diffraction? 1. 7.50 cm 2. 10.0 cm 3. 15.0 cm 4. 30.0 cm This is a multiple choice and I think it's 7.50 cm. Could someone

    asked on January 8, 2018
  51. math

    how many books each 1.5cm thick can be kept in a shelf 1.45m high

    asked on May 23, 2017
  52. math

    on monday 464 students went on a trip to zoo .all 9 buses were filled and 5 students had to travel in cars. how many students were in each bus?

    asked on May 25, 2015
  53. algerbra

    The participants in a weight-loss class lost the following weights (in pounds) after three weeks of dieting: 1,5,2,1,3,6 Assuming that these weights constitute an entire population, find the standard deviation of the population. Round your answer to at

    asked on August 27, 2014
  54. Finance

    Sully Corp. currently has an EPS of $2.35, and the benchmark PE ratio for the company is 21. Earnings are expected to grow at 7 percent per year. Requirement 1: What is your estimate of the current stock price? (Do not round intermediate calculations.

    asked on March 10, 2014
  55. Chemisty

    The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.270 M NaOH. What volume of NaOH is needed to reach the end point of the titration? What was the initial concentration of HCl?

    asked on January 14, 2013
  56. chemistry

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

    asked on November 26, 2012
  57. psychology

    Bronfenbrenner's bioecological theory is often explained by using a diagram that looks like a target with the individual in the bull's eye position. What is his point? A. The individual is a constant target for negative influences of a hostile environment.

    asked on September 27, 2012
  58. physics

    What is the force exerted on 40 micro coulombs by 20 micro coulombs? (charges are separated by 80cm)

    asked on May 2, 2012
  59. Physics

    An infinitely long line charge of uniform linear charge density λ = -3.00 µC/m lies parallel to the y axis at x = -2.00 m. A point charge of 4.70 µC is located at x = 1.50 m, y = 2.50 m. Find the electric field at x = 2.50 m, y = 2.00 m. I get 23.7

    asked on October 9, 2011
  60. Chemistry

    what volume of 1.015mol/L magnesium hydroxide is needed to neutralize 40.0mL of 1.60mol/L hydrochloric acid. Can you work it out please? Thanks!

    asked on January 27, 2011
  61. chem

    what are the normal freezing points and boiling points of the following solutions: a. 21.1g NaCl in 135mL of water b. 15.4g urea in 66.7 mL water?

    asked on January 12, 2011
  62. psychology

    What will you take from this material on leadership and management and apply in your own life?

    asked on October 13, 2010
  63. psychology

    What in the material on "Groups" did you find useful? How will you apply it in your life?

    asked on October 13, 2010
  64. Chem

    Variation of the rate constant with temperature for the first-order reaction 2N2O5(g)  2N2O5(g) + O2(g) Is given in the following table. Determine graphically the activation energy for the reaction. T(K) k(s^-1) 2981.74 x 10^-5 308 6.61 x 10^-5 318 2.51

    asked on July 17, 2010
  65. US History

    What were the British and American military strategies and the war's major turning points?

    asked on September 2, 2009
  66. zero cubed

    What is zero cubed or zero to the third power

    asked on May 1, 2009
  67. chem

    State the type of reaction. Predict the products of the reactions. I have no clue how to do this any help? C3H8 + O2 ---> Mg + HCl ---> AgNO3 + NaCl ---> CuSO4 + Zn ---> How much of this do you know how to do? Just checking answers. Give us your answers

    asked on March 20, 2007
  68. Chemistry

    Need help with these conversions please 0.08206 Latm/molxK to cal/molxK ? 0.08206 Latm/molxK to J/molxK ? I will be happy to critique your work. You have the conversion coefficents. 0.08206 X 101.3 = 8.31 cal per molK 0.08206 x 4.184 = .343 J per molK

    asked on January 21, 2007
  69. Mathematics

    How many days, hours & minutes between 06/29/1947 @ 02:15 a.m. until 08/10/1977 @ 02:15 A.M.

    asked on June 28, 2020
  70. algebra

    The above circle is the base of a cylinder 20cm with height 13.5 cm. Work out the volume of the cylinder.

    asked on May 8, 2020
  71. chemistry

    How many atom of oxygen are present in 8.8g of carbon(iv)oxide

    asked on March 13, 2019
  72. chemistry

    what is the condensed formula for the product of the hydrogenation of 2-butene using a palladium catalyst?

    asked on March 29, 2018
  73. chemistry

    What reagent is commonly used for alcohol oxidation? a. Na2Cr2O7 b.Benedict's Solution c.H2SO4 d. Tollen's Reagent

    asked on March 29, 2018
  74. IT

    What is the best HTML attribute in the world?

    asked on March 23, 2018
  75. science

    A body is dropped the roof of a building 10 mtr high calculate the time and speed g =10 m/s

    asked on August 1, 2017
  76. math c

    A farmer planted cabbages in rows. Each row had 36 cabbages planted at regular intervals of 0.5m.what is the length of each row?

    asked on May 23, 2017
  77. math

    Drawn in a circle whose radius is 14 cm, chord AB is 18 cm long. Calculate the angular size of minor arc AB.

    asked on March 14, 2017
  78. physics

    A man holds a child on shoulders while watching a football match. How much work has he done if the game last for 2 hours

    asked on January 4, 2017
  79. Algebra

    The bongo family has three children, including a pair of twins. The third child is 3 years younger than the twins. The sum of the three ages is 42. How old is each?

    asked on September 25, 2016
  80. stat

    A college basketball player scored the following points in the 37 games he played his senior year: Stem-and-leaf of points n = 37 Leaf Unit = 1.0 1|33 1|66 2|1233444 2|5555666789 3|0222233444 3|89 4|23 4|7 5|2 The first quartile of his point totals is

    asked on September 4, 2016
  81. Math

    A baseball is thrown upward. The path of the baseball models the equation h= -4.9t^2 + 9.2t + 1.6, where h is height of the ball, in metres, after t seconds. How long does it take the baseball to fall to the ground? Plzzz help

    asked on May 8, 2016
  82. math 5th grade

    The width of a picnic table is 3 times its length. If the length is 5 6 -yd long, what is the area of the picnic table in square feet? sides are 2 1/2 yd and 5/6 yard. then to find area 2 1/2 x 5/6 = 2 5/12 y2 how do I find square feet?

    asked on May 5, 2016
  83. Introduction to computers

    Which type of updates should be installed in a test environment before being installed in a live enterprise environment?

    asked on December 14, 2015
  84. Math

    What is the standard deviation for the given data. Round your answer to one more decimal place 3,5,6,6,9,1

    asked on November 15, 2015
  85. Dimensional Analysis Chemistry

    want someone to check if this is right, Q: The concentration of lead in drinking water in a home was found to be 2.1x10-9 M. What is the concentration in ppm? ppb? MM=207.2 g/mol. 1 ppm = 1 mg/L. A: 2.1x10^-9 mol/L x 207.2 g/ 1 mol x 1000 mg / 1 g =

    asked on August 19, 2015
  86. physics

    If an object is thrown in an upward direction from the top of a building 160 ft high at an initial speed of 30 mi/h, what is its final speed when it hits the ground

    asked on May 21, 2015
  87. physics

    A centrifuge for separation of sugar crystals in molasses must exert a force of 6 N/g. If the filter drum has a radius of 350 mm, determine the required speed in the revolution per minute I tried the following F = 6 = 10^-3*a a = 6000 = ω^2*r

    asked on April 14, 2015
  88. physics

    A centrifuge for separation of sugar crystals in molasses must exert a force of 6 N/g. If the filter drum has a radius of 350 mm, determine the required speed in the revolution per minute I tried the following F = 6 = 10^-3*a a = 6000 = ω^2*r

    asked on April 14, 2015
  89. langage arts

    Which of the following passages from the novel is most useful in helping you determine what type of ruler general gage is from Johnny remain? Select all that apply A Sam Adams was so happy his hands shook worse then ever B. He was not brilliant, but he was

    asked on December 17, 2014
  90. capacity problems

    80 buckets of water fill a pond each bucket holds 2litres how much water does the pond hold

    asked on December 6, 2014
  91. chemistry

    How many bonds can each atom make without hybridization? B,N, and O

    asked on December 5, 2014
  92. Chemistry

    How many moles of steric acid are contained in 0.25mL of a hexane solution containing 5.4x10^-4 grams of steric acid/L? (Hint: g/L x L = g/ (g/mol)=mol). Please show your work. Please help. Thank you

    asked on October 6, 2014
  93. Chemistry

    How many moles of steric acid are contained in 0.25mL of a hexane solution containing 5.4x10^-4 grams of steric acid/L? (Hint: g/L x L = g/ (g/mol)=mol). Please show your work. Please help. Thank you

    asked on October 6, 2014
  94. Physics

    What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?

    asked on September 23, 2014
  95. Physics

    If a piano tuner hears 3 beats each second when listening to a 8 Hz tuning fork and a single string on the piano which is of higher frequency.. What is the frequency of the single string from the piano?

    asked on March 20, 2014
  96. physical science

    Suppose you are camping in the mountains and you need to melt 1.8 kg of snow at 0.0 degC to 70.0 degC. The specific heat of water is 4186 j/kg*C while the latent heat of fusion for water equals 3.34 x 10^5 J/kg. How much heat will be needed? Express in KJ.

    asked on March 18, 2014
  97. Physics

    An artery supplying heat muscle with blood is occluded to 13.9% of its original radius by a clot. By what percent is the blood flow through this artery reduced.

    asked on March 17, 2014
  98. Physics

    Neglecting the pressure drop due to resistance, calculate the blood pressure in mmHg in an artery in the brain 32 cm above the heart. The pressure at the heart is 120mmHg and the density of blood is 1.05g/cm3.

    asked on March 17, 2014
  99. FInance

    Most corporations pay quarterly dividends on their common stock rather than annual dividends. Barring any unusual circumstances during the year, the board raises, lowers, or maintains the current dividend once a year and then pays this dividend out in

    asked on March 10, 2014
  100. science

    A new moon is discovered orbiting Neptune with an orbital speed of 9.3 ´ 10 m/s. Neptune’s mass is 1.0 ´ 10 kg. What is the radius of the new moon’s orbit? What is the orbital period? Assume that the orbit is circular. (G = 6.673 ´ 10 N·m/kg)

    asked on March 3, 2014


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