# Power calculations

## Stage 1

1. Find the power of a kettle that uses 367050 J in 150 s.

2. Find the power of a fan that in 123 s uses 8364 J.

3. Find the power of a washing machine that in 268 s uses 136144 J.

4. Find the power of a light bulb that in 65 s uses 5590 J.

5. Find the power of a toaster that in 96 s uses 106560 J.

## Stage 2

6. Find the energy used by a 2981 W kettle in 79 s.

7. Find the time taken for a 518 W washing machine to use 140896 J of energy.

8. Find the energy used by a 88 W light bulb which is on for 166 s.

9. Find the energy used by a 1482 W toaster in 98 s.

10. Find the time taken for a 945 W toaster to use 184275 J of energy.

## Stage 3

11. Find the time taken for a 0.513 kW washing machine to use 173907 J of energy.

12. Find the energy used by a 1.578 kW kettle in 279 s.

13. Find the time taken for a 0.074 kW electric fan to use 4.81 kJ of energy.

14. Find the power of a kettle that in 4 minutes 52 seconds uses 731.752 kJ .

15. Find the energy used by a 0.084 kW light bulb which is on for 186 s.

1. 2447 W

2. 68 W

3. 508 W

4. 86 W

5. 1110 W

6. 235499 J

7. 272 s

8. 14608 J

9. 145236 J

10. 195 s

11. 339 s

12. 440262 J

13. 65 s

14. 2506 W

15. 15624 J