Cooler, less luminous main sequence stars have ________.
A. lower masses
B. masses that vary widely
C. the same masses as hotter stars
D. higher masses
Answer: A
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What has the greater entropy, ice or water? _____________
Fill in the blank(s) with the appropriate word(s).
In the "special theory of relativity," what does the word "special" refer to?
A) This theory is restricted to the study of light beams. B) This theory is restricted to the study of gravitational forces. C) This theory is restricted to the observations of stationary observers. D) This theory is restricted to the observations of accelerated observers. E) This theory is restricted to the observations of non-accelerated observers.
Infall of ________ may explain the higher than expected star formation rates in galaxies
Fill in the blank(s) with correct word
A wave moves in a rope with a certain wavelength. A second wave is made to move in the same rope with twice the wavelength of the first wave. The frequency of the second wave is _______________ the frequency of the first wave
a. 1/2 c. 2 times b. the same as d. unrelated to