(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 3 x 10 kg and its center of mass is 14.0 m above the surrounding ground? J (b) What is the ratio of this energy to the daily food intake of a person (1.2 x 107 J)? :1 Additional Materials Reading Submit