# Power calculations

## Stage 1

1. Find the power of a kettle that uses 246606 J in 138 s.

2. Find the power of a fan that in 64 s uses 3392 J.

3. Find the power of a toaster that in 113 s uses 93903 J.

4. Find the power of a washing machine that in 75 s uses 41925 J.

5. Find the power of a light bulb that in 168 s uses 12768 J.

## Stage 2

6. Find the energy used by a 527 W washing machine in 224 s.

7. Find the time taken for a 1584 W kettle to use 448272 J of energy.

8. Find the energy used by a 84 W electric fan which is on for 250 s.

9. Find the time taken for a 515 W washing machine to use 99395 J of energy.

10. Find the time taken for a 714 W toaster to use 167076 J of energy.

## Stage 3

11. Find the energy used by a 2.373 kW kettle in 3 minutes 20 seconds.

12. Find the power of a fan that uses 14.952 kJ in 168 s.

13. Find the energy used by a 1.226 kW toaster in 1 minute 19 seconds.

14. Find the time taken for a 68 W electric fan to use 19.788 kJ of energy.

15. Find the time taken for a 0.569 kW washing machine to use 113.231 kJ of energy.

1. 1787 W

2. 53 W

3. 831 W

4. 559 W

5. 76 W

6. 118048 J

7. 283 s

8. 21000 J

9. 193 s

10. 234 s

11. 474600 J

12. 89 W

13. 96854 J

14. 291 s

15. 199 s