Electric potential is a scalar quantity
Indicate whether the statement is true or false
TRUE
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A crate of grapes lifted 10 meters gains 200 J of potential energy. If the same crate is instead lifted 20 meters, its gain in potential energy is
A) half as much. B) the same. C) twice as much. D) four times as much. E) more than four times as much.
Suppose the date is June 21 and the Sun never sets, just touching your northern horizon at midnight. Where are you?
A) the equator B) the Tropic of Cancer C) the Tropic of Capricorn D) the Arctic Circle E) the Antarctic Circle
A 1.0-kg block is pushed up a rough 22° inclined plane by a force of 7.0 N acting parallel to the incline. The acceleration of the block is 1.4 m/s2 up the incline. Determine the magnitude of the force of friction acting on the block.
A. 1.9 N B. 2.2 N C. 1.3 N D. 1.6 N E. 3.3 N
Amorphous polymers are _____________subject to mixing with solvents than are crystalline polymers.
Fill in the blank(s) with the appropriate word(s).