Power calculations

Stage 1

1. Find the power of a light bulb that uses 7626 J in 93 s.

2. Find the power of a toaster that uses 289907 J in 239 s.

3. Find the power of a kettle that in 96 s uses 254880 J.

4. Find the power of a washing machine that uses 150088 J in 257 s.

5. Find the power of a fan that in 230 s uses 11500 J.

Stage 2

6. Find the time taken for a 573 W washing machine to use 188517 J of energy.

7. Find the time taken for a 55 W electric fan to use 3520 J of energy.

8. Find the energy used by a 896 W toaster in 220 s.

9. Find the energy used by a 589 W washing machine in 195 s.

10. Find the energy used by a 55 W electric fan which is on for 118 s.

Stage 3

11. Find the energy used by a 0.958 kW toaster in 192 s.

12. Find the energy used by a 0.061 kW electric fan which is on for 215 s.

13. Find the time taken for a 92 W electric fan to use 11.132 kJ of energy.

14. Find the power of a kettle that uses 800.436 kJ in 273 s.

15. Find the time taken for a 0.065 kW electric fan to use 7.93 kJ of energy.

Stage 1

1. 82 W

2. 1213 W

3. 2655 W

4. 584 W

5. 50 W

Stage 2

6. 329 s

7. 64 s

8. 197120 J

9. 114855 J

10. 6490 J

Stage 3

11. 183936 J

12. 13115 J

13. 121 s

14. 2932 W

15. 122 s