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The box of a well-known breakfast cereal states that one ounce of the cereal contains 110 calories (1 food calorie = 4186 Joules). If 2.0% of this energy could be converted by a weight lifters body into work done in lifting a barbell, what is the heaviest barbell that could be lifted a distance of 2.1-m? Topic: Heat; Heat and Internal Energy.

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