Question

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

Answer 1

Answer:

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

Step-by-step 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,

$H=150\times 20$

$H=3000\ W-hr$

We know that,

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

Converting W-hr into BTU,

$3000\ \text{W-hr}=3000\times 3.4\ \text{BTU}$

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

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