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Let's start with a familiar example. The speed of sound is basically fixed, and signals caused by perturbing air molecules will propagate with this speed. This is true regardless o…

Don't forget about gravity as well. Interestingly, cohesion itself is caused by electric fields between water molecules due to their polarity (uneven distribution of charge, oxygen…

Capacitors do store energy, in their electric field. Potential energy in general, as far as I'm aware, is stored in fields of some sort -- water turning a wheel (gravitational), te…