Energy and Momentum: A railroad car collides with and sticks to an identical railroad car that is initially at rest. After the collision, the kinetic energy of the system
A. is the same as before.
B. is half as much as before.
C. is one third as much as before.
D. is one fourth as much as before.
E. is one quarter as much as before.
Answer: B
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David drinks a glass of water in his kitchen. The water is at room temperature, and David decides to make it colder by adding ice. Which of the following describes why the ice cubes will melt?
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2.00 moles of an ideal gas is at a pressure of 1.50 atmospheres and a volume of 0.00100 m3. What is the total kinetic energy of the gas?
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What will be an ideal response?