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
The difference is the surface area, and the effects of surface tension
In the small space at the end of a straw, the air pushing up on the water can’t “get past” the water due to surface tension, so the water stays suspended.
In a swimming pool, the surface tension wouldn’t be as strong, and the water would be able to “get by”, making the water fall out the bottom.
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