A 2000-kg car and a 4000-kg car are hoisted the same vertical distance in a service station. Raising the more massive car requires
A. twice as much work.
B. less work.
C. four times as much work.
D. as much work.
Answer: A
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Indicate whether the statement is true or false.
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A. crystalline B. recycled C. organic D. clastic E. biochemical
Saturn's well-developed rings are made of ________.
A) interstellar gases B) water vapor C) numerous particles of water ice and rocky debris D) frozen methane
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