Question

Suppose a person eats 2000 food calories on average per day. Note that 1 calorie= 4.184 joules and a food calorie = 1000 calories = 4184 joules. What is the average power of this intake? show work

Answer 1

Answer:
`0.097\text{\ J/s}`

Explanation:

Given : 1 calorie= 4.184 joules

A food calorie = 1000 calories = 4184 joules.

Then, 2000 food =
`2*4184=8368` joules [By Unitary method]

We know that :
`\text{Power}=\frac{\text{Energy}}{\text{Time}}`

Since 1 day = 24 hours

and 1 hour = 3600 seconds

Then, 24 hours =
`24\cdot3600=86400` seconds.

Now,
`\text{Power}=(8368)/(86400)`

`=0.0968518518519\approx0.097\text{\ J/s}`

Hence, the average power of this intake =
`0.097\text{\ J/s}`