Question

2.1W iPod is used for 30 minutes. How much energy does it use

Answer 1

The energy is 3780 joule

Explanation:

we are given

Total power is 2.1 watt

so,

P=2.1 W

total time is 30 minutes

now, we can change in seconds

we know that

1 min =60 seconds

so, we get

`T=30* 60sec=1800sec`

we know that

Energy = power*time

`E=P* T`

we can plug value

`E=2.1* 1800`

`E=3780`

So,

The energy is 3780 joule