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"Jeremy ElliottWe’ve all heard of energy, and I’m sure that many of you have some intuition as to what it is. Maybe you’ve read in sci-fi about weapons or fields made of pure energy, but what does that mean? Fortunately, these things are science fiction for a reason, and there’s a much simpler definition. In science, energy is defined as the capability to do work, which is to displace something against a force. Essentially, energy is a measure of how much something can cause something else to mov"
<https://www.thenatphil.com/post/from-the-sea-to-the-stars-and-everything-in-between-where-our-energy-comes-from>