Increasing the temperature of a blackbody by a factor of 3 will increase its energy by a factor of
A) 3. B) 6. C) 9. D) 12. E) 81.
E
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The Jovian problem refers to
a. the high speed with which the Jovian planets rotate on their axes. b. the large number of satellites that orbit each Jovian planet. c. the existence of rings around the Jovian planets. d. the excess heat radiated by the larger of the Jovian planets. e. the apparently short period of time that disks exist around stars from which Jovian planets can form.
Left undisturbed, the footprints left on the Moon by the Apollo astronauts will likely
A) already have been erased by erosion. B) remain visible for a few more decades. C) remain visible for millions of years. D) remain permanently visible on the Moon.
What are the important modes of heat transfer for a person sitting quietly in a room? What if the person is sitting near a roaring fireplace?
GIVEN - Person sitting quietly in a room - Person sitting in a room with a fireplace FIND (a) Modes of heat transfer for each situation ASSUMPTIONS - The person is clothed
The intensity of the waves from a point source at a distance d from the source is I. What is the intensity at a distance 2d from the source?
A) 4I B) 2I C) I/2 D) I/4 E) I/