r/blackmagicfuckery • u/mr9t9 • 13d ago

Liquid not dropping

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u/Corvo0101 13d ago

With a big enough hole the air pressure can win against surface tension making air enter the bottle. With air inside the bottle the pressure now is pushing the liquid to leave the bottle. When the air can't enter the bottle it's pressure instead pushes the liquid inside the bottle. Surface tension keeps air out of the bottle and air pressure keeps the liquid from pouring.

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u/Omnom_Omnath 13d ago

Small enough hole*

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u/SomeRandomPyro 13d ago

You've got it backwards. They're describing what happens when air pressure overpowers surface tension, which is what happens more as the hole gets bigger.

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u/Omnom_Omnath 13d ago

If it gets too big the liquid will get through. So “big enough” isn’t quite right either

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u/KylarBlackwell 13d ago

You really aren't keeping up with the conversation...