Why is the surface of Mercury more level (flatter) than the surface of the Moon?
A. Heat from the Sun made Mercury's surface softer and more malleable.
B. The Moon formed out of the debris from a collision of two larger bodies.
C. Mercury has stronger gravity and had a hotter interior.
D. Tidal forces from Earth have pulled the Moon out of shape.
Answer: C
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How common are supernova events in our galaxy?
What will be an ideal response?
Supergiant stars are burning different fuels in several shells around the core
Indicate whether the statement is true or false
A gas is quickly compressed in an isolated environment. During the event, the gas exchanged no heat with its surroundings. This process is
A) isothermal. B) isochoric. C) isobaric. D) adiabatic. E) idealistic.
Suppose that we allow an ideal gas containing N atoms to expand slowly and isothermally to twice its initial volume. By what factor does its multiplicity increase?
A. By a factor of 2. B. By a factor of 2N. C. The multiplicity does not change. D. The answer depends on the gas’s initial volume. E. The answer depends on the gas’s fixed temperature.