Which of the following hypotheses for the origins of the Moon is generally accepted by astronomers?
A. The Moon is the result of a collision between Earth and a Mars-sized object in the early days of the solar system (the collision theory).
B. The Moon formed somewhere else and was later captured by Earth (capture theory).
C. The Moon formed alongside Earth (the twin theory).
D. The Moon was originally a bulge on Earth that was flung off by the rapidly spinning Earth (fission theory).
Answer: A
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A) 95.4 kPa B) 47.7 kPa C) 44.4 kPa D) 225 kPa E) 66.7 kPa
Underground molten rock material is known as ______________
Fill in the blank(s) with correct word
A runner leaves the starting blocks and accelerates at 2.60 m/s2 for 4.00 s. What speed does the runner reach?
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In order to produce a sustained interference pattern by light waves from multiple sources, which of the following conditions must be met?
a. Sources are monochromatic. c. Both choices a and b are valid. b. Sources are coherent. d. None of these are valid.