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(a) How much gravitational potential energy (relative to the ground on which it is built) is stored in an Egyptian pyramid, given its mass is

(a) How much gravitational potential energy (relative to the ground on which it is built) is stored in an Egyptian pyramid, given its mass is about 5 109 kg and its center of mass is 28.0 m above the surrounding ground? J (b) What is the ratio of this energy to the daily food intake of a person (1.2 107 J)? :1

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