Problem 66PE

Unreasonable Results 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. (a) How many kcal are supplied by the metabolization of 0.500 kg of fat? (b) Calculate the kcal/min that you would have to utilize to metabolize fat at the rate of 0.500 kg in 2.00 h. (c) What is unreasonable about the results? (d) Which premise is unreasonable, or which premises are inconsistent?

Solution to 66PE

Step 1 of 5

We need to calculate how much energy is supplied when of fat is burned. We also need to calculate the rate at which fat will be metabolized into energy in 2 hours. We need to check the reasonableness of these results.

Given data:

Energy generated by fat,

Time taken to burn of fat is