body fat is metabolized, supplying 9.30 kcal/g, when dietary intake is less than needed to fuel metabolism. the manufacturers of an exercise bicycle claim that you can lose 0.500 kg of fat per day by vigorously exercising for 2.00 h per day on their machine. how many joules of energy needed to turn the bike pedals are supplied by the metabolization of 0.500 kg of fat.