Scientific Ontology

P

Mechanics

Power

Rate of energy transfer or conversion.

watt (W)

Dimension: $[\,M L^2 T^{-3}\,]$

How values of power span the physical world (in W, log scale).

Human at rest

10² W

Car engine

10⁵ W

Power station

10⁹ W

Sun's output

3.80 × 10²⁶ W

Lower limit10^-12 WUpper limit10²⁶ W

Power

P = \dfrac{W}{t}

Electrical Power

P = V I

Stefan–Boltzmann Law

L = \sigma A T^4

Intensity

I = \dfrac{P}{A}