Two cars are traveling down the highway in the same direction. Car A is traveling at 30.0 m/s and car B is passing car A at a relative speed of 3.0 m/s. Using Galilean relativity to calculate the speed of car B relative to the highway results in an answer incorrect by how many m/s?
a. 
b. 
c. 
d. 
e. 
e.
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What are the small bits of rock and metal that collide with Earth's atmosphere?
a. meteors b. comets c. asteroids d. meteorites e. meteoroids
TE is much smaller for lead than for iron. Which therefore has the greater heat capacity per atom at T = 100 K?
A. Lead B. Iron C. Both should be about the same.
Velma passes Mort at a high speed. According to Mort, his clock has progressed by one hour while Velma's clock progressed by only 40 minutes. What does Velma observe?
A) Mort's clock progressed by one hour while Velma's clock progressed by 80 minutes. B) Mort's clock progressed by 40 minutes while Velma's clock progressed by one hour. C) Mort's clock progressed by one hour while Velma's progressed by 40 minutes. D) both clocks progressed by one hour. E) The answer cannot be determined, because we don't know Velma's speed.
What happens to its moment of inertia when a steel disk is heated?
a. It increases. b. It decreases. c. It stays the same. d. It increases for half the temperature increase and then decreases for the rest of the temperature increase.