The larger the diameter of a telescope, the more light it will collect
a. True
b. False
Indicate whether the statement is true or false
True
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Intensity of Sound: You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity level of the sound? It drops by
A. 2 dB. B. 3 dB. C. 6 dB. D. 8 dB.
The significant result of the Michelson-Morley experiment was that it found
a. the ether moved with the Sun. b. the ether moved with the Earth. c. the speed of the ether wind was greater than expected. d. no effect.
An infinitely long cylinder of radius R = 2 cm carries a uniform charge density ? = 18 ?C/ m3. Calculate the electric field at distance r = 1 cm from the axis of the cylinder
A) 2.5 × 103 N/C B) 5.1 × 103 N/C C) 0 D) 2.0 × 103 N/C E) 10.2 × 103 N/C
John rapidly pulls a plunger out of a cylinder, increasing its volume. As the plunger moves away, the gas molecules bouncing elastically off the plunger are:
a. rebounding at a higher speed than they would have if the plunger weren't removed. b. rebounding at a lower speed than they would have if the plunger weren't removed. c. rebounding at the same speed as they would have if the plunger weren't removed. d. Whether they speed up or slow down depends on how fast the plunger is removed.