According to the laws of thermal radiation, hotter objects emit photons with
A) a shorter average wavelength.
B) a lower average frequency.
C) a lower average energy.
D) a higher average speed.
A) a shorter average wavelength.
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Whether the universe is open, closed or flat depends on the ____ of the universe
a. luminosity b. density c. temperature d. radius e. rotation rate
A large ice mass that flows on a land surface under the influence of gravity is called
a. a glacier. b. a land slide. c. an ice river. d. none of these.
Light is without mass, so how can gravity have an effect on light?
A) The space through which the light passes is curved. B) Photons actually have a very small mass, so gravity does have an effect on them. C) When light interacts with particles, it loses some energy, and thus takes on some mass. D) Gravity has no effect on light.
An ideal gas is confined to a container with adjustable volume. The number of moles and temperature are constant. By what factor will the volume change if pressure quadruples?
a. 16 c. 1/4 b. 4 d. 1/16