Which will stay cooler for a longer time in a picnic cooler on a hot summer day?
A) sandwiches
B) salami
C) Jello
Answer: C
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Which arrow best indicates the direction of the electric field at point P created by particle C?
A. A B. B C. C D. D E. Zero F. AA G. BB H. CC I. DD
Radioactivity Basics: Polonium-216 decays to lead-212 by emitting what kind of nuclear radiation?
A. alpha B. beta-minus C. beta-plus D. gamma E. x-rays.
Unpolarized light is passed through polarizer 1 . The light then goes though polarizer 2 with its plane of polarization at 60.0° to that of polarizer 1 . What fraction of the intensity of the original light gets though the second polarizer?
a. 0.125 c. 0.707 b. 0.250 d. 0.500
If you think of a battery as an electric charge ‘pump,' the battery voltage is analogous to
a. rate of fluid flow b. pressure c. flow velocity d. water e. none of the above