1. 1 MJ

2. 1 MJ
= J
= Nm
= kg m2 /s2
= kg m2 /s2

3. = 9810000 kg m2 /s2 1 MJ Potential Energy 1 MJ = m g h = 100 9.81 h
1 MJ = Energy to lift 100 kg man
~1000 m

5. Food and Fuels = 3 kg Celery
1 MJ
Food and Fuels
= 3 kg Celery

6. Food and Fuels = 3 kg Celery = 1 kg Spinach
1 MJ
Food and Fuels
= 3 kg Celery
= 1 kg Spinach

7. Food and Fuels = 3 kg Celery = 1 kg Spinach = 36 g Coal
1 MJ
Food and Fuels
= 3 kg Celery
= 1 kg Spinach
= 36 g Coal

8. Food and Fuels = 3 kg Celery = 1 kg Spinach = 36 g Coal = 33 g Butter
1 MJ
Food and Fuels
= 3 kg Celery
= 1 kg Spinach
= 36 g Coal
= 33 g Butter

9. 1 MJ = 3 kg Celery = 1 kg Spinach = 36 g Coal = 33 g Butter = 26 g Oil
Food and Fuels
= 3 kg Celery
= 1 kg Spinach
= 36 g Coal
= 33 g Butter
= 26 g Oil

10. 1 MJ = 3 kg Celery = 1 kg Spinach = 36 g Coal = 33 g Butter = 26 g Oil
Food and Fuels
= 3 kg Celery
= 1 kg Spinach
= 36 g Coal
= 33 g Butter
= 26 g Oil
= 20 g Gas

11. 1 MJ = m (cp T + L) = m (4186/1000000) x 80 + 2.5) = m ( 0.33 + 2.5)
Heat Energy
= m (cp T + L)
= m (4186/ ) x )
= m ( )
= 2.83 m
= Energy to boil 0.35 kg of water

12. 1 MJ

13. 1 MJ = 1/3.6 kWh = 0.28 kWh = 0.28 kW for 1 hour = 280 W for 1 hour
Electricity
= 1/3.6 kWh
= 0.28 kWh
= 0.28 kW for 1 hour
= 280 W for 1 hour
= 3 light-bulbs for 1 hour

14. 1 MJ

15. Metabolic Rates Walking for 1 hour
1 MJ
Metabolic Rates
Walking for 1 hour

16. 1 MJ

17. 1 MJ