Calculate the stored chemical energy per unit mass of  following foods in units of Btu per pound-mass. Then compare your  the energy density of gasoline, expressed as a ratio (gasoline energy/food energy). An approximate value for the energy density (heating value) of gasoline is 20,000 Btu per pound-mass. One food calorie (or large calorie) is equivalent to 4184 joules.

A. A 12-fluid ounce can of soft drink containing 120 food calories per can. One fluid ounce is 1.805 cubic inches. The density of the soft drink is 1.1 gram/milliliter.

B. A 3.8-oz bagel containing 290 food calories. One ounce (mass) is 1/16 of a pound-mass.

C. A 21.3-g serving of honey containing 64 food calories. This serving size is approximately equivalent to one tablespoon.