A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 135 lb person burn during 7 hours of sleep? (Note that 1 Cal = 1 kcal.)
See the problem about walking you posted above. Same process.
To calculate the number of Calories burned during 7 hours of sleep, you need to multiply the rate at which the average adult burns calories by the weight of the person and the duration of sleep.
First, convert the weight of the person from pounds to kilograms. Divide 135 by 2.205 to get approximately 61.2 kilograms (kg).
Next, convert the rate of calorie burn from pounds to kilograms. Multiply 0.45 by 0.453 to get approximately 0.204 kg (since 1 pound is equal to 0.453 kilograms).
Now, calculate the number of Calories burned during 7 hours of sleep:
Calories burned = rate of calorie burn (Cal/kg/h) × weight (kg) × duration of sleep (h)
Calories burned = 0.204 Cal/kg/h × 61.2 kg × 7 h
Calories burned ≈ 880.94 Calories
Therefore, a 135 lb person would burn approximately 880.94 Calories during 7 hours of sleep.