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Q. An athlete at the gym holds a 1.50 steel ball in his hand. His arm is 70 long and has a mass of 4.00 .What is the magnitude of torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?

Q. If an amount of heat equal to magnitude of the work done by friction is absorbed by the crate of fruit and the fruit reaches a uniform final temperature, what is its temperature change DeltaT?

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