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What is a calorie?
a) Amount of heat needed to raise one gram of water one degree Celsius.
b) Amount of work needed to move one gram of water by one centimeter.
c) Amount of heat needed to melt ice.
d) Amount of heat needed to raise one gram of water one degree Fahrenheit
Ans- Amount of heat required to raise one gram of water one degree celsius
Tiger Woods can hit a golf ball with 55 N of force. How hard does the ball hit back on the club? (a) more than 55 N of force, (b) less than 55 N of force, (c) exactly 55 N of force
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A man pushes a couch a distance of 0.75 m. If 113 J of work is done. what is the magnitude of the horizontal force applied?
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