Question

How much heat (Btu) is produced by a 150-W light bulb that is on for 20-hours?

Answer 1

The heat is produced by a 150-W light bulb that is on for 20-hours is 10200 BTU.

Explanation:

To find : How much heat (Btu) is produced by a 150-W light bulb that is on for 20-hours?

Solution :

A 150-W light bulb is on for 20-hours.

The heat produced by bulb is given by,

`H=150* 20`

`H=3000\ W-hr`

We know that,

`1\ \text{W-hr}=3.4\ \text{BTU}`

Converting W-hr into BTU,

`3000\ \text{W-hr}=3000* 3.4\ \text{BTU}`

`3000\ \text{W-hr}=10200\ \text{BTU}`

Therefore, The heat is produced by a 150-W light bulb that is on for 20-hours is 10200 BTU.