PHYSICS HIGH SCHOOL

A growing person needs a diet that supplies about 10MJ of energy per day. Calculate the amount of energy supplied by such a diet each second, and hence the person’s average power. (Give your answer to the nearest 10W)

Answers

Answer 1
Answer:

We are given that a growing person needs a diet that supplies about 10 MJ of energy per day.

To convert this to energy supplied per second, we can use the following conversion:

1 day = 24 hours/day x 60 minutes/hour x 60 seconds/minute = 86400 seconds

Therefore, the energy supplied per second is:

10 MJ/day = 10,000,000 J/day ÷ 86400 seconds/day = 115.74 J/s

The person's average power is the energy supplied per second, which is:

P = 115.74 J/s ≈ 120 W (rounded to the nearest 10 W)

Therefore, the person's average power is approximately 120 W.

To know more about average power, click here:-

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