Of the known planets in our solar system, the innermost is Mercury. When compared to the other planets in the system, Mercury has:
a. the greatest centripetal acceleration.
c. the smallest speed. b. the greatest period of revolution.
d. none of the above properties.
A
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The planet in our solar system with the highest average surface temperature is
A) Venus. B) Mercury. C) Earth. D) Neptune.
Spectral lines from Galaxy B are redshifted from their rest wavelengths twice as much as the spectral lines from Galaxy A. According to Hubble's law, what can you say about their approximate relative distances?
A) Galaxy A is twice as far as Galaxy B. B) Galaxy B is four times as far as Galaxy A. C) Galaxy A is four times as far as Galaxy B. D) Galaxy B is twice as far as Galaxy A. E) Not enough information to say—you need to know Hubble's constant to answer this question.
What is the maximum possible arc that can be subtended by a rainbow? (Consider all possible viewing geometries)
a. 90° b. 180° c. 270° d. 360°
A material through which heat conducts slowly is called a __________
Fill in the blank(s) with correct word