What is meant by an adiabatic surface?
What will be an ideal response?
An adiabatic surface is one which does not allow any heat transfer, whether it is
conduction, convection, or radiation.
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Contrast the original and present uses of the Cosmological Constant
What will be an ideal response?
Suppose one twin takes a ride in a spaceship traveling at a very high speed to a distant star and then back again, while the other twin remains on Earth
Compared to the twin who remained on Earth, the astronaut twin is A) the same age as the Earth-twin. B) younger than the Earth-twin. C) older than the Earth-twin. D) The ages cannot be determined from the information provided.
An object is at rest on the equator. Estimate its acceleration relative to the center of the Earth in m/s²
1.less than 0.001 2.between 0.001 and 0.01 3.between 0.01 and 0.1 4.between 0.1 and 1 5.between 1 and 10 6.between 10 and 100 7.between 100 and 1,000 8.between 1,000 and 10,000 9.more than 10,000 10.Impossible to determine
When we look toward the constellation Sagittarius, we are looking
A) at the galaxy's central bulge. B) toward Polaris, the "Pole Star." C) toward the Winter Triangle. D) out toward the outer Milky Way.