this post was submitted on 08 Mar 2025
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Energy in physics feels analogous to money in economics. Is a manmade medium of exchange used for convenience. It is the exchange medium between measureable physical states/things.

Is energy is real in the same way money is? An incredibly useful accounting trick that is used so frequently it feels fundamental, but really it's just a mathmatical convenience?

Small aside: From this perspective 'conservatipn of energy' is a redundant statement. Of course energy must be conserved or else the equations are wrong. The definition of energy is it's conservation.

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[–] dohpaz42 3 points 1 day ago (1 children)

I’m a layman, but it seems to me you’re conflating apples and oranges.

Money is a tool invented by humans. It only exists because we created it for our purposes. If humans never existed, money would likely not exist. And someday, money as we know it, will likely change.

Energy, on the other hand, is something that exists regardless of humans. It is a concept that does not change, regardless of how you describe it.

[–] tomi000 0 points 1 day ago* (last edited 1 day ago) (1 children)

Thats actually what OPs question was about, and I would argue its not exactly like youre saying. Energy is a concept used by humans to categorise natural processes. Its more like saying "kilometers exist regardless of humans". While technically true, nothing is "naturally" measured in kilometers and there woudnt really "be" a kilometer without humans.

[–] dohpaz42 4 points 1 day ago

I understand. But I would counter with kilometers is a unit of distance. Energy is not a unit of measure. For that we have other words, like watts and volts and many others.

Energy and distance do exist without humans. How we measure both is a human construct like you said.