When a solid melts,
A) the temperature of the substance increases.
B) the temperature of the substance decreases.
C) heat energy leaves the substance.
D) heat energy enters the substance.
Answer: D
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a. 1
b. 2
c. 3
d. 2 and 3
e. none of them
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If an object of mass 20 kg on earth is sent to the moon it will have a mass of
A. 10 kg. B. 20 kg. C. 0.0 kg. D. 4.0 kg.
A ring and a disk both at rest roll down a hill together. Which rolls slower?
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