Uniform Circular Motion: The Moon is accelerated toward the earth, so it is gradually getting closer to the earth.
A. True
B. False
C. The moon is not accelerated toward the earth.
Answer: B
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A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, what is the person's power output?
Approximately how large in diameter would the star Betelgeuse be on this same scale?
A) 40 centimeters (the size of a typical beach ball) B) 6 meters (roughly the size of a dorm room) C) 130 meters (slightly larger than a football field) D) 3 kilometers (the size of a small town)
At some point between Earth and the Moon, the forces due to gravity on a space traveler would be the same when this point is
A) nearer Earth. B) nearer the Moon. C) mid-way between Earth and the Moon. D) none of the above
The ocean crust
A) becomes progressively younger away from the mid-ocean ridges. B) is the same age worldwide. C) becomes progressively older away from the mid-ocean ridge. D) ranges in age, the oldest ocean crust is in the Atlantic and the youngest is in the Arctic.