In stellar astronomy, _____ states that the weight of each layer of a star must be supported by the layer below
A) the law of conservation of mass
B) the law of conservation of energy
C) the law of hydrostatic equilibrium
D) the law of energy transport
C
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What is the most abundant molecule in interstellar clouds besides molecular hydrogen?
A) ammonia B) water C) methane D) molecular helium E) carbon monoxide
The Permian extinction event was mostly likely caused by
A) widespread volcanic activity in Siberia B) an asteroid impact C) the onset of a snowball Earth phase D) the reversal of the Earth's magnetic field
What is the underlying cause of air motion?
What will be an ideal response?
The latent heat of vaporization of water is roughly 10 times the latent heat of fusion of water. The amount of heat required to boil away 1 kg of water is __________ the amount of heat required to melt 1 kg of ice
a. one tenth b. equal to c. 10 times d. unrelated to