(Do not try the following: it could kill you. This question is only about a hypothetical possibility.) If you were standing below an object emitting a fixed frequency sound falling at terminal velocity, as it approached you, you would hear the sound
a. drop in frequency.
b. stay at the same frequency.
c. increase in frequency.
d. decrease in loudness.
e. stay at the same loudness.
b
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Two stones, one twice the mass of the other, are dropped from a cliff. Just before hitting the ground, what is the kinetic energy of the heavy stone compared to the light one?
a) quarter as much b) half as much c) the same d) twice as much e) four times as much
Assume a gram of a substance marketed as "Pure Energy" is annihilated by a gram of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 109 watts of power?
A. 40 hrs B. 25 hrs C. 50 hrs D. 65 hrs E. 50000 hrs
Refracting Telescope: You have a choice between two lenses of focal lengths fa and fb, where fb = 2fa, to use as the objective lens in building a refracting telescope. If the magnification you obtain using lens a is Ma, what will be the magnification when using lens b?
A. Mb = 2 Ma B. Mb = 4 Ma C. Mb = 8 Ma D. Mb = Ma/4 E. Mb = Ma/2
Which is a correct list of frequencies from lowest to highest?
a. Radio, visible light, X rays. b. Visible light, radio, X rays. c. Visible light, ultra violet, infrared. d. X rays, visible light, radio. e. Radio, X rays, visible light.