All materials or substances have heat in them until their temperature reaches what level?
Ans: -273°C (-459°F)
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Population II stars contain more metals than Population I stars
a. True b. False Indicate whether the statement is true or false
You ride on an elevator that is moving with constant upward acceleration while standing on a bathroom scale. The reading on the scale is
A) equal to your true weight, mg. B) more than your true weight, mg. C) less than your true weight, mg. D) zero. E) could be more or less than your true weight, mg, depending on the magnitude of the acceleration.
The density of a neutron star is
a. about the same as that of a white dwarf. b. about the same as that of the sun. c. about the same as an atomic nucleus. d. zero
The light-gathering power of a telescope varies with the ________ of the diameter of the lens or mirror
Fill in the blank(s) with correct word