@wolfie62
Why so hostile, Wolfie? We were discussing residential AC power, which varies greatly from place to place. Pwera introduced an equation which relates to that. Those who know Fourier analysis are enriched thereby - those who do not are told where to look. Again: what's the problem with that?
Oddly enough, your quotation of that equation WOULD be just as useful. If we wanted to make a fission bomb, the most important thing would be the fundamental physics that show it to be possible, and the energy-mass equivalence (up to a scaling factor) is the basis of all subsequent theory (binding energies, cross-sections, etc.).