Weigh yourself on a weighing scale and the scale shows your normal weight. If you carefully stand on tiptoes, the scale reading will be
A) slightly more.
B) slightly less.
C) about half as much.
D) no different.
Answer: D
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If Burl carries Paul piggy-back while standing in the middle of a scaffold, the tensions in the two supporting ropes would
A) cancel to zero. B) be equal. C) be in dynamic equilibrium. D) more easily support Burl and Paul.
The atmosphere of Saturn is composed mostly of:
A) methane and ammonia. B) carbon dioxide and ethane. C) hydrogen and helium. D) hydrogen sulfide and ammonia. E) nitrogen and oxygen.
The area of a loop of wire is reduced by a factor of 2 while the rate of change of magnetic field applied is doubled. What happens to the induced emf in that loop of wire?
A) It is doubled. B) It is reduced by a factor of 2. C) It is reduced by a factor of 4. D) It is quadrupled. E) It stays the same.
During the peak of a total annular eclipse, the image of the Sun cast onto some white paper is
A) a circle. B) a crescent. C) a large white spot. D) not going to be seen.