The sidereal period of the Moon is
a. about 27.32 days long.
b. the period of time for the Moon to orbit Earth once with respect to the stars.
c. the period of time between successive eclipses at a given location on Earth.
d. the period of time from when the Moon rises until the Moon rises again the next night.
e. about 27.32 days long and the period of time for the Moon to orbit Earth once with respect to the stars.
e
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About 540 million years ago, a sudden increase in biological complexity occurred, known as the _______________
Fill in the blank(s) with correct word
In order to double the average speed of the molecules in a given sample of gas, the temperature (measured in Kelvins) must
A) quadruple. B) reduce to one-fourth its original value. C) triple. D) double. E) reduce to one-half its original value.
If a freely falling object were equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s2, then its speed reading would increase each second by
A) 10 m/s. B) 20 m/s. C) 30 m/s. D) 40 m/s. E) depends on its initial speed
Work-Energy Theorem: A stone initially moving at 8.0 m/s on a level surface comes to rest due to friction after it travels 11 m. What is the coefficient of kinetic friction between the stone and the surface?
A. 0.13 B. 0.25 C. 0.30 D. 0.43 E. 0.80