Suggest another term for internal energy and justify.

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A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 40 kg barbell straight up from chest height to full arm extension, a distance of 0.50 m.a. How much work does the weightlifter do to lift the barbell one time?b. If the weightlifter does 20 repetitions a day, what total energy does she expend on lifting, assuming a typical efficiency for energy use by the body.c. How many 400 Calorie donuts can she eat a day to supply that energy?

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Chapter 9, Problem 42PQ

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Suggest another term for internal energy and justify.

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A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 40 kg barbell straight up from chest height to full arm extension, a distance of 0.50 m.a. How much work does the weightlifter do to lift the barbell one time?b. If the weightlifter does 20 repetitions a day, what total energy does she expend on lifting, assuming a typical efficiency for energy use by the body.c. How many 400 Calorie donuts can she eat a day to supply that energy?

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Which of the following statements is/are true? Check all that apply. The SI unit of power is the horsepower. The SI unit of power is the watt. A person is limited in the total work he or she can do by the rate at which energy can be transformed. Power is the rate at which energy is transformed. Power is the rate at which work is done. A person is limited in the total work he or she can do only by the total energy required.