eli5 why can a straw carry water without the bottom dripping but not a pool?

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Essentially my question is this: if I get a straw and put it in water, I cover my thumb on the top and pull out, water doesn’t want to leave. Idk why or how but regardless.

How come this same thing doesn’t apply for a swimming pool? Like a body of water is suspended because it has a lid or roof?

In: Physics

10 Answers

Anonymous 0 Comments

Air has weight and pushes on everything all the time you just don’t notice because it pushing everywhere evenly . Your finger on top of the straw keeps air from entering the straw from the top. The air at the bottom of the straw is pushing on the water in keeping it in the straw.

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