The farthest galaxies from the Milky Way appear to be receding from us at the rate of 76,000 miles/sec. An observer in one of these distant galaxies would consider our galaxy to be
A. moving away at 76,000 miles/sec.
B. standing still but not at the center of the universe.
C. moving at 76,000 miles/sec and located at the center of the universe.
D. one of the few moving galaxies in the universe.
E. standing still at the center of the universe.
Answer: A
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A. (a) 2.0 × 105 N (b) 1.7 × 105 N B. (a) 1.7 × 105 N (b) 2.0 × 105 N C. (a) 2.6 × 103 N (b) 2.0 × 105 N D. (a) 2.0 × 105 N (b) 2.6 × 103 N
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To operate properly, superconductors must be kept below a critical temperature. The highest critical temperature for currently available superconductors is about
A. 10 K. B. 300 K. C. 200 K. D. 100 K. E. 25 K.
The dielectric strength of rutile is 6.0 × 10^6 V/m, which corresponds to the maximum electric field that the dielectric can sustain before breakdown. What is the maximum charge that a 10-10-F capacitor with a 0.50-mm thickness of Rutile can hold?
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