If an object was freely falling, from what height would it need to be dropped to reach a speed of 70.0 m/s before reaching the ground?
A)
250 m
B)
322 m
C)
189 m
D)
500 m
E)
712 m
A
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What are the latitudes of the tropics of Cancer and Capricorn?
A) 66.5°N and 66.5°S B) 23.5°N and 23.5°S C) 45.0°N and 45.0°S D) 32.5°N and 32.5°S
What is tidal heating?
A) a source of internal heat caused by varying tidal forces acting on a moon or other object B) a source of internal heat that occurs on all moons that are large enough to be spherical C) a source of surface heating caused by the sloshing of water or other liquids D) a source of surface heating caused by active volcanoes like those on Io
One observation supporting the idea of a spherical Earth is that ________.
A. a traveler moving south will see stars they could not previously see B. a ship moving away from the observer will move such that the hull is not seen, then the sails C. the shape of Earth's shadow on the Moon during an eclipse is circular D. All of these choices are correct.
In a laser the emitted light is __________
Fill in the blank(s) with correct word