What heats the water in a naturally heated hot spring?
A) nuclear fission within the Earth
B) nuclear fusion within the Earth
C) the high pressures existing within the Earth
D) gamma radiation from the sun
E) radioactivity in the Earth
E
Physics & Space Science
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a. True b. False Indicate whether the statement is true or false
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How many states are in the n = 4 shell?
A. 4 B. 9 C. 16 D. 18 E. 32
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In powder fabrication of metals and ceramics, when the pressed powder part is sintered, the powder particles bond to each other, and voids are reduced by the ___________of atoms.
Fill in the blank(s) with the appropriate word(s).
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The main sequence is luminosity class V
Indicate whether the statement is true or false
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