Some meteorites that survive the plunge to Earth's surface contain organic compounds
Indicate whether the statement is true or false
TRUE
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Glass is transparent to
A) infrared light. B) visible light. C) ultraviolet light. D) all of the above
Several electrons are placed on a hollow conducting sphere. They
A) clump together on the sphere's outer surface. B) clump together on the sphere's inner surface. C) become uniformly distributed on the sphere's outer surface. D) become uniformly distributed on the sphere's inner surface. E) become randomly distributed on the shere's outer and inner surfaces.
Ten kilograms of water at 0°C is mixed with 10 kg of water at 100°C. The change in entropy (in cal/K) of the system is
a. 1 000 b. 480 c. -720 d. 240 e. -168
A radioactive isotope has a half-life of one week. At the end of two weeks the amount remaining is
1) none, 2) one-eighth, 3) one-quarter, 4) one-half, and at the end of three weeks the amount remaining is 5) none. 6) one-eighth. 7) one-quarter. 8) one-half.