Lunar ________ are the result of ancient lava flows on the Moon
Fill in the blank(s) with correct word
maria
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Assume that Hubble's constant is 22 kilometers per second per million light-years. Then we would expect a galaxy 100 million light-years away to be moving (Assume the motion is due only to Hubble's law.)
A) away from us at 2,200 km/s B) away from us at 220 km/s C) toward us at 2,200 km/s D) away from us at 22,000 km/s
In constructing a thermometer it is NECESSARY to use a substance that:
A. expands with rising temperature B. expands linearly with rising temperature C. will not freeze D. will not boil E. undergoes some change when heated or cooled
Inward migration is a hypothesis used to explain why
A) Jupiter-sized planets are seen orbiting close to some stars B) some stars do not have Jupiter-sized planets C) some stars do not have planets at all D) Terrestrial-sized planets are seen orbiting far from some stars
The position of a particle moving along the x axis is given by x = 6.0t2 ? 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?
a. 24 m b. 12 m c. 32 m d. 16 m e. 2.0 m