The air inside a bicycle tire pump has 60 joules of work done on it as 20 joules of heat is conducted away from it. What is the change in internal energy of the air?
40 J
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The Cassini mission to Saturn consists of
A) an orbiter that orbits Saturn and a probe that descended to the surface of Titan. B) a large spacecraft that flew by Saturn on its way to other planets. C) an orbiter that orbits Saturn and a probe that descended into Saturn's atmosphere. D) a spacecraft that orbits Saturn and a sample return mission that landed on Titan, scooped up a surface sample, and will return it to Earth.
When 0.50 kg of water at 0°C freezes, what is the change in entropy of the water? The latent heat of fusion of water is 33,400 J/kg
A) 0 J/K B) -17,000 J/K C) -610 J/K D) 17,000 J/K E) 610 J/K
As soon as a bowling ball rolls off the edge of a table its horizontal component of velocity
A) decreases. B) remains constant. C) increases.
On the scale of the cosmic calendar, in which the history of the universe is compressed to 1 year, how long has human civilization (i.e., since ancient Egypt) existed?
A) a few seconds B) about a month C) less than a millionth of a second D) a few hours E) about half the year