A satellite is moved from a low orbit to one that is twice as far from Earth. Its mass at its new orbit is ________.
A. increased by a factor of 2
B. decreased by a factor of 2
C. unchanged
D. decreased by a factor of 4
E. There is no gravity in space.
Answer: C
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What happens to the core of a star after it ejects a planetary nebula?
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Fill in the blank(s) with the appropriate word(s).
When a proton moves in a direction of the electric field, its potential increases but its potential energy decreases
Indicate whether the statement is true or false