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  • How can energy be created and destroyed?

  • As we know through thermodynamics, energy cannot be created nor destroyed. It simply changes states. The total amount of energy in an isolated system does not, cannot, change. And thanks to Einstein, we also know that matter and energy are two rungs on the same ladder. The universe as a whole is closed.

  • What happens to energy when we die?

  • We can gain energy (again, through chemical processes), and we can lose it (by expelling waste or emitting heat). In death, the collection of atoms of which you are composed (a universe within the universe) are repurposed. Those atoms and that energy, which originated during the Big Bang, will always be around.

  • What is the point of defining energy?

  • The point of defining energy is to obtain a conserved scalar quantity — as an example of how this works out, have a look at the derivation of the Newtonian formula for kinetic energy, where energy conservation is disguised as kinetic energy is equal to the heating produced when it’s destroyed.

  • What happens to your light when you die?

  • Those atoms and that energy, which originated during the Big Bang, will always be around. Therefore, your 鈥渓ight,鈥?that is, the essence of your energy 鈥?not to be confused with your actual consciousness 鈥?will continue to echo throughout space until the end of time.

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