Power is the rate with respect to time at which work is done; it is the time derivative of work: $${\displaystyle P={\frac {dW}{dt}},}$$ where P is power, W is work, and t is time. See more

The dimension of power is energy divided by time. In the International System of Units (SI), the unit of power is the watt (W), which is equal to one joule per second. Other common and traditional measures are horsepower (hp), comparing to the power of a … See more

Power is related to intensity at a radius $${\displaystyle r}$$; the power emitted by a source can be written as: $${\displaystyle P(r)=I(4\pi r^{2}).}$$ See more

As a simple example, burning one kilogram of coal releases more energy than detonating a kilogram of TNT, but because the TNT reaction releases energy more quickly, it … See more

Power in mechanical systems is the combination of forces and movement. In particular, power is the product of a force on an object and the object's velocity, or the product of a … See more

• Simple machines
• Orders of magnitude (power)
• Pulsed power
• Intensity – in the radiative sense, power per area
• Power gain – for linear, two-port networks See more