Popular questions and responses by Ami
  1. PHY

    Two snowcats tow a housing unit to a new location at McMurdo Base, Antarctica, as shown in Figure 4-46. The sum of the forces A and B exerted on the unit by the horizontal cables is parallel to the line L, and FA = 4300 N. Determine FB and the magnitude of

    asked on September 13, 2010

    A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity of the particle at x = 8.0 m is 2.8 m/s. What is the acceleration during this time interval?

    asked on September 15, 2008
  3. PHY

    The components of a vector V can be written (Vx, Vy, Vz). What are the components and length of a vector which is the sum of the two vectors, V1 and V2, whose components are (5.0, 1.3, -15.0) and (2.3, -4.7, -1.0)?

    asked on August 22, 2010
  4. A.P. Economics

    8. Which factor of production is represented by each of the following? An office building: An assembly line worker: A tree used to make paper: Unused soil: An artist: A student:

    asked on August 6, 2009
  5. physics

    The earth has a radius of 6380 km and turns around once on its axis in 24 h. 1)What is the radial acceleration of an object at the earth's equator? Give your answer in m/s^2 2) What is the radial acceleration of an object at the earth's equator? Give your

    asked on September 9, 2010
  6. physics

    According to recent test data, an automobile travels 0.250 mi in 19.9 s, starting from rest. The same car, when braking from 60.0 mi/h on dry pavement, stops in 146 ft. Assume constant acceleration in each part of the motion, but not necessarily the same

    asked on September 1, 2010
  7. STOR

    Each of the following statements contain a blunder. Explain in each case what is wrong. a) There is a high correlation between the age of American workers and their occupation. b) we found a high correlation (r=1.19) between students rating of faculty

    asked on September 6, 2012
  8. physics

    A block of ice of mass 4.10 kg is placed against a horizontal spring that has force constant k = 210 N/m and is compressed a distance 2.60×10−2 m. The spring is released and accelerates the block along a horizontal surface. You can ignore friction and

    asked on October 7, 2010
  9. phyics

    The position of a 2.75 *10^5 N training helicopter under test is given by r = (0.020 m/s^3)(t^3)i + (2.2 m/s)(t)j - (0.060 m/s^2)(t^2) k Find the net force on the helicopter at t =5.0s. Express your answer in terms of i,j,k. Express your coefficient using

    asked on September 16, 2010
  10. phy

    A baseball is hit nearly straight up into the air with a speed of 24 m/s. (a) How high does it go? (b) How long is it in the air?

    asked on August 26, 2010

    Starting from a pillar, you run a distance 200 m east (the + x-direction) at an average speed of 5.0 m/s, and then run a distance 280 m west at an average speed of 4.0 m/s to a post. Q: Calculate your average velocity from pillar to post.

    asked on August 31, 2010
  12. CHEM

    Calculate the vapor pressure at 25 C of hexane above the solution. The vapor pressure of pure hexane at 25 C is 151 torr. A solution contains naphthalene ({\rm{C}}_{10} {\rm{H}}_8) dissolved in hexane ({\rm{C}}_6 {\rm{H}}_{14}) at a concentration of 12.17

    asked on June 5, 2010
  13. Geometry :)

    1) Segment CD has endpoints (-4, 3) and (8, -1). Find the coordinates of the point that divides the line segment directed from C to D in the ratio of 2:3. A) (6/5,26/5) B) (4/5,7/5) C) (1/5,13/5) D) (16/5,3/5) I would provide what I think the answer is-

    asked on September 21, 2019
  14. Stor 155

    a data set lists apartments available for students to rent. Information provided includes the monthly rent, whether or not cable is included free of charge, whether or not pets are allowed, the number of bedrooms, and the distance to the campus. Describe

    asked on August 25, 2012
  15. physics

    The electric field E_1 at one face of a parallelepiped is uniform over the entire face and is directed out of the face. At the opposite face, the electric field E_2 is also uniform over the entire face and is directed into that face (the figure ). The two

    asked on February 19, 2011
  16. Physics

    When two vectors vector A and vector B are drawn from a common point, the angle between them is phi. If vector A and vector B have the same magnitude, for which value of phi will their vector sum have the same magnitude as vector A or vector B?

    asked on August 26, 2010
  17. PHY

    The coefficient of static friction between hard rubber and normal street pavement is about 0.68. On how steep a hill (maximum angle) can you leave a car parked?

    asked on September 12, 2010
  18. statistics

    What is wrong with the following statements? a) For a large n, the distribution of observed values will be approximately Normal b) 68-95-99.7 rule says that "x bar" should be within m (mean) +/- 2 SD (standard deviation) about 95% of the time c) The

    asked on October 14, 2012
  19. phy

    A boat can travel 2.60 m/s in still water.If the boat points its prow directly across a stream whose current is 1.10 m/s, what is the velocity (magnitude and direction) of the boat relative to the shore? What will be the position of the boat, relative to

    asked on September 5, 2010
  20. World History

    The Master answered, ‘Never fail to comply.’ Fan Ch’ih was driving. The Master told him about the interview, saying, ‘Meng-sun asked me about being filial. I answered, “Never fail to comply.”‘ Fan Ch’ih asked, ‘What does that mean?’ The

    asked on October 7, 2019
  21. physics

    Who will hear the voice of a singer first-a person in the balcony 50 m away from the stage (Fig. 22-19), or a person 2000 km away at home whose ear is next to the radio? Assume that the microphone is a few centimeters from the singer and the temperature is

    asked on March 17, 2011
  22. physics

    An engineer of a passenger train traveling at 25.0 m/s sights a freight train whose caboose is 200m ahead on the same track. The freight train is traveling at 15.0 m/s in the same direction as the passenger train. The engineer of the passenger train

    asked on September 2, 2010
  23. phys

    A disk rolls down a slope. It rotational axis is its center of mass. It is rotation at a constant angular speed making 34.0 full revolutions in a time interval of 3.30 s. 1)What is the rotational inertia of the disk if its mass is 11.7 kg, and its radius

    asked on December 7, 2009
  24. soc

    Which of the following is NOT a question that a social conflict theorist would ask in studying a situation? Choose one answer. a. What is the inequality in this situation? b. What sorts of social change might result from the inequality in society? c. Who

    asked on June 16, 2010
  25. CHM 152

    For the system 2A (g) + B( g) = 2C (g), if the initial concentration of pure C is 1.00 M, the equilibrium concentration is 0.40 M. What is the value of Kc? Choose one answer. a. 5.0 b. 0.45 c. 0.67 d. 2.2 e. 1.5

    asked on March 26, 2010
  26. story

    Investment reports often include correlations. Following a table of correlations among mutual funds , a reports add," Two funds can have perfect correlation, yet differnet levels of risk. For example, Funda A and Fund B may be perfectly correlated, yet

    asked on September 5, 2012
  27. phy

    What mass of steam at 100°C must be added to 1.00 kg of ice at 0°C to yield liquid water at 15°C?

    asked on December 2, 2010
  28. phy

    An ordinary glass is filled to the brim with 350.0 mL of water at 100°C. If the temperature decreased to 19°C, how much water could be added to the glass?

    asked on November 24, 2010
  29. phy

    Two crates, of mass m1 = 60 kg and m2 = 130 kg, are in contact and at rest on a horizontal surface (Fig. 4-54). A 620 N force is exerted on the 60 kg crate. The coefficient of kinetic friction is 0.15.

    asked on September 12, 2010
  30. physics

    A projectile is being launched from ground level with no air resistance. You want to avoid having it enter a temperature inversion layer in the atmosphere a height h above the ground. 1) What is the maximum launch speed you could give this projectile if

    asked on September 10, 2010
  31. algebra

    simplify the following radical expression: 3 sqrt (-27) a) 0 b) -3 c) 3 d) no solution exists

    asked on June 21, 2010
  32. chm

    What is the pH of the solution obtained by mixing 30.00mL OF 0.250M HCL AND 30.00mL OF 0.125M NaOH?

    asked on March 31, 2010
  33. chm152

    When solid NH4HS is placed in a closed flask at 28 C, the solid dissociates according to the equation: NH4HS(s) NH3(g) + H2S(g) The total pressure of the equilibrium mixture is 0.766 atm. Determine Kp at this temperature. Choose one answer. a. 0.147 b.

    asked on March 27, 2010
  34. phys

    Water flows steadily from an open tank into a pipe as shown in the figure. The elevation of the top of the tank is 12.3 m, and the elevation at the pipe is 3.80 m. The initial cross-sectional area of the pipe (at point 2) is 5.60×10−2 m^2; and at where

    asked on December 9, 2009
  35. phys

    Consider an antelope being chased by a tiger. The antelope is running at a velocity of 5.21 m/s at an angle 14.3 degree E of S. The tiger is running at a velocity of 11.64 m/s at an angle of 31.4 degree W of S. (Use East as positive x and North as postive

    asked on November 27, 2009
  36. ChemistryPRELABS

    In the synthesis of K3[Al(C2O4)3].3H2O, 0.0357 moles of the limiting reagent were used in the reaction. What is the maximum possible yield? And which is the limiting reagent?

    asked on December 1, 2015
  37. ChemistryPRELABS

    The mass of potassium iodate (KIO3) contained in an impure sample was determined by titration with sodium thiosulfate (0.1005 M). The impure KIO3 was dissolved in 50 cm 3 of water, an excess of potassium iodide (KI) and 5 cm 3 of dilute sulphuric acid was

    asked on October 6, 2015
  38. stor

    Suppose that you flip a fair coin (P(H)=P(T)=1 2 ) three times and you record if it landed on heads, H, or tails, T. (a) What is the sample space of this experiment? What is the probability of each event? (b) [1 pt] Let X be the number of times that you

    asked on September 29, 2012
  39. Stor 155

    a report on the assets of american households says that the median net worth of the U.S. families is $120,300. The mean worth of these families is $556,300. What explain the difference between these two measures of center?

    asked on August 28, 2012
  40. sociology

    Why lighter skins people thought that they are superior to all others.?

    asked on April 6, 2011
  41. Chem

    What molarity of a NH4NO3 solution has a pH of 5.220? Kb for NH3 is 1.8 x 10^-5. Choose one answer. a. 6.31x 10-6. b. 2.21 x 10-6 c. 5.56x 10-10. d. 0.065 I started by taking the inverse log of the PH to get (6.02*10^-6) then I was thinking its not the way

    asked on April 6, 2010
  42. A.P. Economics

    Why must the opportunity cost of a decision always be something desirable?

    asked on August 12, 2009
  43. ChemistryPRELABS

    Mixtures of oxygen and nitrogen show almost ideal boiling behaviour. Nitrogen boils at 77.36 K and oxygen boils at 90.30 K. What is the boiling point of air?

    asked on November 9, 2015
  44. math

    The shape of a patio is trapezoidal with a height of 9 ft and bases of 14 ft and 8 ft. What is the cost 24) of outdoor carpeting to cover the patio if the carpeting costs $2.50 per ft2?

    asked on November 5, 2013
  45. biology

    1.Briefly explain the evolution of limb orientation and the effects of limb posture on support and locomotion. 2.The transition from the aquatic to the terrestrial environment resulted in what kind of evolutionary changes in the girdles of tetrapods? Why

    asked on September 16, 2013
  46. biology

    what is burgess shale? what is the significance of this discovery to evolutionary biology

    asked on September 8, 2012
  47. business

    Can any one tell me any five legal issues in the movie "Catch me if you can"

    asked on January 12, 2012
  48. calculus

    Use division of power series to find the first three terms of the Maclaurin series for y = sec x.

    asked on August 1, 2011
  49. anthroplogy

    wht are the rich getting richer and the rest of us not? Use domestication emergence and social stratification to explain

    asked on July 12, 2011
  50. anthropology

    how same sex marriage define neo evolution theory.

    asked on July 8, 2011
  51. phy

    In a capacitor, you have two plates, one is connected to a battery but other is not, how the other plate become charge ups.

    asked on February 7, 2011
  52. phy

    Two point charges have a total charge of 525 µC. When placed 1.15 m apart, the force each exerts on the other is 25.7 N and is repulsive. What is the charge on each? (Round your answers to the nearest µC.)

    asked on January 21, 2011
  53. phy

    Two crates, of mass m1 = 60 kg and m2 = 130 kg, are in contact and at rest on a horizontal surface (Fig. 4-54). A 620 N force is exerted on the 60 kg crate. The coefficient of kinetic friction is 0.15. (a) Calculate the acceleration of the system.(to the

    asked on September 13, 2010
  54. phy

    Two crates, of mass m1 = 60 kg and m2 = 130 kg, are in contact and at rest on a horizontal surface (Fig. 4-54). A 620 N force is exerted on the 60 kg crate. The coefficient of kinetic friction is 0.15.

    asked on September 12, 2010
  55. PHY

    What must be true for two vectors to add up to ZERO? Choose all that apply. 1)Their y-components must be equal. 2)They must be anti-parallel (point in opposite directions). 3) Their x-components must be equal. 4)They must be parallel (point in the same

    asked on August 22, 2010
  56. his

    in august 1945 the US dropped the atomic bomb on japan what are the justification for and aganist dropping the bomb?

    asked on July 26, 2010
  57. algebra

    Simplify: 3 sqrt () 2 + 5 sqrt () 2 a) 8 sqrt () 2 b) 15 sqrt () 2 c) 16 d) 16 sqrt () 2

    asked on June 9, 2010
  58. algebra

    Which is NOT a common factor of the following monomials? 16xy^2y, 12xy, 8xy^2 a) 4x b) 4y c) xy d) x^2y^2 I think the answer is d

    asked on May 30, 2010
  59. mat 172

    solve the equation: arccosx+arccos2x=arccos1/2

    asked on March 30, 2010
  60. chm152

    Consider the equilibrium of water with gaseous hydrogen and oxygen: Give the value of for this reaction, if it is written as: Choose one answer. a. -7.8 x 10^-16 b. -3.9 x 10^-16 c. 1.3 x 10^-15 d. 6.4 x 10^-14 e. 3.6 x 10^2

    asked on March 27, 2010
  61. Psychology

    How does astigmatism affect the way the perceptual system works?

    asked on April 18, 2019
  62. Math

    If I drive a rental car .45miles at 25.00 dollars per day and my other rental car .25miles at 40.00 per day how many miles must i drive for them to cost the same

    asked on January 9, 2017
  63. Physics

    i)A boy of 45kg is 5m above a swimming pool on a spring board. The boy jumps up into the air which is 2m above the spring board before falling into the water. What is the maximum depth the boy can reach in the water if the average resisting force of water

    asked on June 15, 2016


    asked on May 14, 2014
  65. analytical chemistry

    compund x is known to absorb at 510nm. If you dilute a solution containing x by 1/4, by how much does the absorbance increase or decrease. if it stays the same just state it stays the same.why

    asked on March 26, 2013
  66. math

    i need help im stuck on this question please help me heres the input 25 and the output is 15

    asked on January 8, 2013
  67. Physics

    In a quality control test a steel ball with mass M falls a distance of H and bounces off a steel plate and through a hole in the wall into the ok bucket. If the ball bounces up a distance of 9/10H after hitting that plate and has a velocity of Vo at point

    asked on November 14, 2012
  68. statistics

    3. Consider selecting a starting line up for an intermural 6-on-6 indoor soccer team where you are required to have 4 students and 2 faculty on the court at all times. As everyone on your team have equal skills, you decide to randomly assign members to

    asked on October 15, 2012
  69. African American

    Amazing fact regarding African American in Randolph County

    asked on October 6, 2012
  70. African American

    Amazing fact regarding African American in Randolph County

    asked on October 6, 2012
  71. Stor

    Here is a simple way to create a random variable X that has mean μ and stan- dard deviation σ: X takes only the two values μ−σ and μ+σ, eachwith probability 0.5. Use the definition of the mean and variance for discrete random variables to show that

    asked on October 4, 2012
  72. stor

    Recall the Prisoners problem from class. We have three prisoners (A, B, and C) on death row. The Governor will pardon one of the prisoners, and he tells the Warden who he chose, but the warden is not allowed to reveal who was pardoned. Lets switch things

    asked on September 29, 2012
  73. stor

    Twitter: Suppose that the population proportion of Internet users whosay they use Twitter or a similar service to post updates about themselves or to see updates about others is 19%. Think about selecting random samples from a population in which 19% are

    asked on September 17, 2012
  74. Stor 155

    Use the definition of the mean to show the sum of the deviation of the observations from their mean is always zero. This is one reason why variance and standard deviation use squared deviations.

    asked on August 30, 2012
  75. Stor 155

    In computing the median income of any group, some federal agencies omit all members of the group who had no income. Give an example to show that the reported median income of a group can go down even though the group becomes economically better off. Is

    asked on August 30, 2012
  76. Math

    What does the net of a cube look like?

    asked on August 4, 2012
  77. math

    write a definition for an equivalent fraction. A. a fraction of multiplication B. fraction with unlike denominators C. a fraction with the value of n D. a fraction thar represents equal amount I put down D.

    asked on July 29, 2012
  78. CHEM

    For the equilibrium reaction Co(g)+H2O(g)CO2(g)+H2(g) the Keq value at 690°C is 10.0. A mixture of 0.300 mol of CO, 0.300 mol of H2O, 0.500 mol of CO2 and 0.500 mol of H2 is placed in a 1.0 L flask. a) Write the Keq expression for this reaction and use

    asked on January 27, 2012
  79. biol

    How did tree productivity change over time in each of the forest stands, and how was productivity altered by N additions? Consider possible reasons to explain the pattern that you see in the data.

    asked on January 26, 2012
  80. chem

    A solution initially contains 0.350 mol/L of A and 0.750 mol/L of B. A reaction occurs according to the equation 2 A(aq)+B(aq) 3 C(aq)+D(s) At equilibrium, [C] is found to be 0.100 mol/L. What is the value of Keq?

    asked on January 26, 2012
  81. Economics

    A firm is currently producing in the elastic portion of its demand curve. What course of action do you recommend for it assuming it wants to raise revenue? Continue producing at the current output level, because it maximizes its total revenue by producing

    asked on November 19, 2011
  82. chemistry

    how to draw newman projection for different structure

    asked on September 11, 2011
  83. biology

    How to write an outline for scientific method experiment

    asked on September 8, 2011
  84. anthropology

    Incest- why cannot we sleep with our brother?

    asked on July 11, 2011
  85. anthropology

    hominids characteristics and adaptation

    asked on June 27, 2011
  86. eng

    I want to konw how harry potter support violence. I REALLY MEANT THIS ANSWER.

    asked on May 30, 2011
  87. sociology

    Does race effect the self esteem of children?

    asked on April 6, 2011
  88. sociology

    Why it is ok for Girl to wear boys clothes but deviant behavior for boy to wear girl clothes

    asked on April 1, 2011
  89. chemestry

    When you lowered the pH of your combined aqueous NaOH extracts, you observed precipitation of benzoic acid. Explain what happened during this acidification and why the precipitation of benzoic acid occurred.

    asked on March 30, 2011
  90. physics

    This is my lab project and i need help in how to start to solve this problem. Determine the buoyant force on a balloon(filled with air) as a function of depth. At what depth does neutral buoyancy occur.

    asked on March 18, 2011
  91. phy

    A 175 kg horizontal beam is supported at each end. A 300 kg piano rests a third of the way from one end. What is the vertical force on the support closest to the piano? N What is the vertical force on the support furthest from the piano? N

    asked on October 22, 2010
  92. phy

    is that true faster objects have a greater acceleration than slower objects?

    asked on September 18, 2010
  93. phy

    is the net force on venus is zero?

    asked on September 17, 2010
  94. phy

    is that true or false A rock is thrown straight up into the air At the peak its acceleration was zero

    asked on September 17, 2010
  95. physics

    A rock is thrown from the roof of a building with a velocity v at an angle of alpha from the horizontal. The building has height h. You can ignore air resistance. Calculate the magnitude of the velocity of the rock just before it strikes the ground

    asked on September 10, 2010
  96. phy

    At what projection angle will the range of a projectile equal to 3 times its maximum height?

    asked on September 7, 2010
  97. phy

    at what projection will the range of a projectile equal to 2 times its maximum height?

    asked on September 5, 2010
  98. religion

    how modern religion benefits from indigenous religion?

    asked on August 29, 2010
  99. phy

    A helicopter is ascending vertically with a speed of 5.50 m/s. At a height of 155 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the

    asked on August 26, 2010
  100. physics

    A stone is dropped from the top of a cliff. It hits the ground below after 3.10 s. How high is the cliff?

    asked on August 26, 2010


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