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Question: The average energy consumed by a human being in a day is:...

The average energy consumed by a human being in a day is:

A

2400 cal

B

2400 J

C

2400 KJ

D

2400 Kcal

Answer

2400 Kcal

Explanation

Solution

The average energy consumed by a human being in a day is

=107 J4.2×103 J/kcal=2400kcal= \frac { 10 ^ { 7 } \mathrm {~J} } { 4.2 \times 10 ^ { 3 } \mathrm {~J} / \mathrm { kcal } } = 2400 \mathrm { kcal }