Power calculations

Stage 1

1. Find the power of a light bulb that uses 10494 J in 198 s.

2. Find the power of a kettle that uses 719562 J in 258 s.

3. Find the power of a washing machine that uses 64192 J in 118 s.

4. Find the power of a toaster that uses 248064 J in 204 s.

5. Find the power of a fan that uses 8004 J in 92 s.

Stage 2

6. Find the energy used by a 622 W washing machine in 253 s.

7. Find the time taken for a 2122 W kettle to use 331032 J of energy.

8. Find the energy used by a 2264 W kettle in 186 s.

9. Find the time taken for a 1256 W toaster to use 301440 J of energy.

10. Find the energy used by a 41 W light bulb which is on for 96 s.

Stage 3

11. Find the time taken for a 1.321 kW toaster to use 317.04 kJ of energy.

12. Find the energy used by a 2869 W kettle in 1 minute 36 seconds.

13. Find the energy used by a 926 W toaster in 3 minutes 33 seconds.

14. Find the power of a toaster that uses 156.894 kJ in 158 s.

15. Find the time taken for a 0.452 kW washing machine to use 151.872 kJ of energy.

Stage 1

1. 53 W

2. 2789 W

3. 544 W

4. 1216 W

5. 87 W

Stage 2

6. 157366 J

7. 156 s

8. 421104 J

9. 240 s

10. 3936 J

Stage 3

11. 240 s

12. 275424 J

13. 197238 J

14. 993 W

15. 336 s