Asleeping 68 kg man has a metabolic power of 71 w . how many calories does he burn in 8 hours of sleep?

Explanation:

Power is related to energy by the formula:

where

P is the power

E is the energy used

t is the time taken

In this problem, we know the power, P = 71 W, and the time taken:

so, the energy burned is

And since 1 cal = 4.186 J, we can convert into calories

Energy, E = 488.71 calorie

Explanation:

It is given that,

Mass of the man, m = 68 kg

Metabolic power of the man, P = 71 W

Time taken, t = 8 hours = 28800 s

Let E is the amount of energy transferred in given time. It can be calculated as :

E = 2044800 J

or

E = 2044.8 kJ

Since,

1 calorie = 4.19 kJ

E = 488.71 calorie

So, he burn 488.71 calorie in 8 hours of sleep. Hence, this is the required solution.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

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