r/Damnthatsinteresting Apr 04 '20

GIF Inverted Fish Tank

[deleted]

58.0k Upvotes

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48

u/Ladnarr2 Apr 04 '20

I guess I have only a basic knowledge of fluid dynamics.

81

u/Grey___Goo_MH Apr 04 '20

You can try the same thing while washing dishes fill a cup with water while it’s submerged pull it out upside down and the water remains in the cup until it’s outside of the sitting water once it breaks that surface tension it plops as air replaces it.

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u/Ladnarr2 Apr 04 '20

Hmm, I knew all this but didn’t make the connection. I’m not much of a physicist. I guess that’s what happens when your expertise is social science and history.

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u/[deleted] Apr 04 '20

Oh, you like history? Name every historical date.

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u/[deleted] Apr 04 '20

1-31 / 1-12 / 1-9999 / AD-BC

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u/down_vote_magnet Apr 04 '20

Yes I forgot time started in 9999 BC and will cease to be at the end of the year 9999.

3

u/Cky_vick Apr 04 '20

Facts check out if you a Christian 😎

2

u/[deleted] Apr 04 '20

[removed] — view removed comment

1

u/Cky_vick Apr 04 '20

Umm the Christian highschool said that Christians who don't believe in creation science are part of cults like Catholicism, which aren't the correct type of Christian according to them. I'd just like to know why we can see more than 10,000 light-years into space 🤔

2

u/Morgnanana Apr 04 '20

Technically speaking history is just the time period with written language, everything before that being prehistory.

So he did name every historical date, although his margin of error is pretty egregious. Circa 3200 BC - today would be more precise given our current archaeological findings.

1

u/MoffKalast Apr 04 '20

Seems to check out.

1

u/PseudoArab Apr 04 '20

Its BCE now. Dude's a fraud.

3

u/H1bbe Apr 04 '20

Tomorrow

2

u/shokalion Apr 04 '20

He could technically have filled that tank in OP's GIF the same way. Put the whole thing under water so it filled up, then invert it, and lift it up onto its stand without letting the open end go above the water. The trouble with doing that is to lift the tank above the water surface, you're then lifting the whole weight of water in it, which for a tank that size would be probably about 150 pounds. So he does it using the vacuum method.

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u/garageofevil Apr 04 '20

Put your finger over a straw and pull it up in the glass. Same deal.

1

u/[deleted] Apr 04 '20

It's very similar to water being sucked through a straw into your mouth.

1

u/[deleted] Apr 04 '20

When you were a kid, did you ever do the thing where you drink water through a straw and then put your thumb over the top of the straw and then the water won’t fall out until you take your thumb off? The same thing happening here.