Potential Energy
a) How much gravitational potential energy (in J) (relative to the ground on which it is built) is stored in an Egyptian pyramid, given its mass is about 8 ? 109 kg and its center of mass is 45.0 m above the surrounding ground?
(answer in J)
(b) What is the ratio of this energy to the daily food intake of a person (1.2 ? 107 J)?
(ratio versus :1)