Find how many grams of carbohydrate does a person of mass 74 kilogram need to metabolize to climb five flights of stairs (15 meter height increase)? Each gram of carbohydrate provides 17.6 kilojoules of energy. Suppose 10.0 percent efficiency - that is, 10.0 percent of the available chemical energy in the carbohydrate is converted to mechanical energy. Explain what happens to the other 90 percent of the energy?