The source of a sonic boom
A) must be a sound emitter.
B) may or may not be a sound emitter.
C) is not a sound emitter.
D) none of the above
Answer: B
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Electric Field of Point-Charges: A small glass bead has been charged to 1.9 nC. What is the strength of the electric field 2.0 cm from the center of the bead? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 4.3 × 104 N/C B. 8.5 × 102 N/C C. 8.1 × 10-5 N/C D. 8.5 × 10-7 N/C
How many electrons can be found with principal quantum number in a suitably heavy atom?
A) 18 B) 6 C) 20 D) 9
Artificial transmutations are generally achieved using
a. Geiger counters. b. particle accelerators. c. tokamaks. d. mass spectrometers.
What is true of spring tides?
A) The third quarter Moon would be high overhead at dawn. B) The difference between low and high tides would be greatest. C) There would be one high and one low tide each day. D) The Moon's phase will be first quarter. E) The difference between low and high tides would be smallest.