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unit

Energy

Work

Definition

The energy and work is the physical measure, which defines the value equal to the scalar effect, the force outcome for moving to a distance of a body on which the force is applied.

1 joule is the work done when the point of application of 1 newton moves a distance of 1 metre in the direction of the force.

 

system of units:   SI;
statute:   derived unit (with a special name);
name the value:   E, W;
unit name:   joule;
symbol unit:   J;
relationship of definition:   E = P·τ, W = F·l;
dimension:   M L2 T-2;
expression in other units:   kcal, Btu, Term;

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Units of measurement

namesymbol value in SI unit:
J
note
1 watt hourW·h= 3 600 
1 watt secondW·s= 1.0 
1 British thermal unitBtuIT≈ 1 055.056(1)
1 British thermal unitBtuth≈ 1 054.350(2)
1 British thermal unitBtu≈ 1 055.87(12)
1 British thermal unitBtu≈ 1 059.67(3)
1 British thermal unitBtu≈ 1 054.80(4)
1 British thermal unitBtu≈ 1 054.68(5)
1 caloriecalIT= 4.186 8(1)
1 caloriecalth= 4.184(2)
1 caloriecal≈ 4.185 80(6)
1 caloriecal≈ 4.181 90(7)
1 horsepower hourHp·h≈ 2.647 8 × 106 
1 electronvolteV≈ 1.602 176 × 10-19 
1 ergerg= 10-7 
1 foot pound-forceft·lbf≈ 1.355 818 
1 thermthm= 1.055 060 × 108(8)
1 thermthm= 1.054 804 × 108(9)
1 ton TNT = 4.108 × 109(10)
1 quad≈ 1.055 056 × 1018(11)
1 foot poundal≈ 0.042 1401 1 

Note:

(1) - common (international);

(2) - thermochemistry;

(3) - 39 °F;

(4) - 59 °F;

(5) - 60 °F;

(6) - 15 °C;

(7) - 20 °C;

(8) - UE;

(9) - US;

(10) - energy equivalent;

(11) - 1015 BtuIT;

(12) - mean;