An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft moves to a position three times as far from the center of the asteroid, the force will be
A) zero.
B) 40 N.
C) 120 N.
D) 360 N.
E) 1080 N.
Answer: B
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Which part of the electromagnetic spectrum generally gives us our best views of stars forming in dusty clouds?
A) infrared B) visible light C) ultraviolet D) blue light
An object is being acted upon by three forces and moves with a constant velocity. One force is 60.0 N along the x-axis, the second is 75.0 N along the y-axis. What is the magnitude of the third force?
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The vertical columns of elements in the periodic table are called
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