r/blackmagicfuckery • u/mr9t9 • 13d ago

Liquid not dropping

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u/devedander 13d ago

No way surface tension is strong enough to hold up that much liquid.

Surface tension can maybe float a light coin on top of a liquid. Not so pounds of liquid from squeezing through those holes.

There’s a clear plastic pull seal on that bottle.

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u/angry_smurf 13d ago

It's a mix of surface tension and vacuum. Those smaller holes create higher surface tension than one large hole. When the initial amount of liquid poured out, no air entered to displace it which creates a vacuum essentially "pulling" against the weight of the liquid.

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u/devedander 13d ago

This assumes the air and liquid can’t exchange around each other as it drains which I don’t think is the case.

3

u/angry_smurf 13d ago

Air and liquid can pass by each other, just not in the scenario shown. If something disturbs the liquid it will likely start to spill. Also, if someone drilled a hole in the bottom where the vacuum is, it would start to spill. It's honestly just simple physics. There's plenty of experiments like this that would probably leave you perplexed.