The food calorie, equal to 4186 , is a measure of how much energy is released wh

Question

The food calorie, equal to 4186 , is a measure of how much energy is released when food is metabolized by the body. A certain brand of fruit-and-cereal bar contains 155 food calories per bar. part b If, as is typical, only 22.0 of the food calories go into mechanical energy, what would be the answer to part (a)? (Note: In this and all other problems, we are assuming that 100 % of the food calories that are eaten are absorbed and used by the body. This is actually not true. A person's "metabolic efficiency" is the percentage of calories eaten that are actually used; the rest are eliminated by the body. Metabolic efficiency varies considerably from person to person.) note 860.7575758 is not correct. i already used that.. thank you

Explanation / Answer

ANSWER 1. Gravitational PE = mass x gravity x height The energy would be 4186 x 160 = 670,000 J 670,000 = 65(9.8) h h = 1051 m 2. h = 1051(25%/100) = 263 m

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