For an exposed surface, this quantity equals the integral of the Poynting vector.
This quantity is shown to be Lorentz invariant in a formula in which it is expressed as "charge squared" times "acceleration squared" over 6-pi-epsilon times the "speed of light cubed". This quantity also appears in the numerator of a dimensionless number relating the resistance and inertial forces that is sometimes named for Newton. The ratio of a load's real value for this property and an AC circuit's apparent value for this property are given by its namesake (*) "factor".  For an exposed surface, this quantity equals the integral of the Poynting vector. Rotationally, this quantity equals the dot product of torque and angular velocity, and in a circuit it equals the "current squared" times resistance. For 10 points, name this quantity equal to the amount of work per unit time whose SI unit is the Watt.
This quantity is shown to be Lorentz invariant in a formula in which it is expressed as "charge squared" times "acceleration squared" over 6-pi-epsilon times the "speed of light cubed".
power [prompt on "P"] (first line refers to the Larmor formula, second clue is the Newton Number) 