eli5: On an atomic level, how does an atom ‘know’ it belongs to (for example) a sheet of paper but not the sheet of paper below it. Also how do scissors interact with the paper on an atomic level to cut it into two pieces.
In: Physics
There are four forces in the universe. Weak and strong nuclear (that’s the atomic ones you need) gravity and electromagnetism. They are if varying power. Breaking the strong nuclear one is what makes cities go bang. That’s what holds the paper together, as paper. What holds it together as a piece of paper, is the weak one. You can cut that.
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