a ratio (gasoline energy/food energy). An approximate value for the energy density of gasoline is 20,000 Btu per pound-mass. One food calorie (or large calorie) is equivalent to 4184 joules. One ounce (mass) is1/16 of a pound-mass. A.A one-cup serving of vanilla ice cream with a mass of 4.7 ounces and containing 273 food calories. A large 9-oz pear when peeled and cored with a mass of 8.1 ounces and containing 133 food calories.В.

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