Compared to a 50-kg person, a 100-kg person at the beach requires
A) twice as much suntan lotion.
B) the same amount of suntan lotion.
C) less than twice as much suntan lotion.
Answer: C
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Captain Ahab notices that the waves passing the anchored Pequod are 10 feet from crest to crest, and that each minute 4 crests pass. The wave speed is
A. 20 feet per minute. B. 80 feet per minute. C. 40 feet per minute. D. 5 feet per minute.
A 10-m uniform beam weighing 100 N is supported by two vertical ropes at its ends. If a 400-N person sits at a point 2.0 m from the left end of the beam, what is the force that each rope exerts on the beam?
What will be an ideal response?
Angular Momentum: A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg ? m2. If he pulls in his arms so his moment of inertia decreases to 1.80 kg ? m2, what will be his new angular speed?
A. 2.25 rad/s B. 4.60 rad/s C. 6.25 rad/s D. 0.81 rad/s
Can a star become a red giant more than once?
A) yes, before and after the helium flash B) no, the planetary nebula blows off all the outer shells completely C) yes, before and after the Type II supernova event D) no, or we would see them as the majority of naked-eye stars E) no, it will lose so much mass as to cross the Chandrasekhar Limit