1 MJ.

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Presentation transcript:

1 MJ

1 MJ = 1000000 J = 1000000 Nm = 1000000 9.81 kg m2 /s2 = 9810000 kg m2 /s2

= 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

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

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

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

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

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

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

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 (4186/1000000) x 80 + 2.5) = m ( 0.33 + 2.5) = 2.83 m = Energy to boil 0.35 kg of water

1 MJ

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

1 MJ

Metabolic Rates Walking for 1 hour 1 MJ Metabolic Rates Walking for 1 hour

1 MJ

1 MJ