|
Unit |
Notes |
|
|
Joule |
J |
Measure of energy |
| Newton | N | Measure of force - the force required to accelerate 1kg by 1 metre/second/second |
|
Watt |
W |
Measure of power. 1 volt applied to a circuit drawing 1 ampere. |
|
Calorie |
A measure of energy. There are actually THREE different calories. |
|
| cal | The small calorie is the amount of heat energy required to raise the temperature of 1 of water by 1 Celsius. This is equal to 4.184 Joules. | |
| The international calorie is 1/860 watt-hours. | ||
| kcal or Cal |
A kiloCalorie (1,000 calories) is still widely used as a measure of the energy content of food. Many manufacturers and diet books incorrectly abbreviate this unit as "cal" on packaging. |
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