Re: Microwave oven
"Microwaves are specifically tuned to a resonant frequency of water molecules, even a small change to that frequency completely loses the effect."
A common misconception. Microwave ovens would work at any practical frequency (wavelength dictates possible oven sizes) given the amount of power used. Water molecule resonance is not required. The only reason they use 2.45GHz is that it's the most suitable of a number of freely usable bands for ISM (Industrial Scientific & Medical) applications with no licence needed.