- #1

RFreund

- 5

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- TL;DR Summary
- Hydrostatic pressure just doesn't sit well with me and I'm hoping someone can help me understand it better.

I understand that pressure increases with depth regardless of the shape of the container. However, this doesn't sit well with me. Imagine a container: 8' tall x 1" wide x 1' long. The pressure at the bottom of the container is 8' x 62.4 pcf = 499.2psf. However, the weight of the water in the container is only 8' x 1/12 x 1' x 62.4 = 41.6 lbs.

Can someone help me rationalize this?

It's hard to imagine pouring 5 gallons of water into a container and generating this type of force.

Or another crazy thought experiment is starting with gallon of water in a box with a closed top and a tall, very narrow tube on top. Now imagine the sides can slide inward to squeeze the water up. At some point the force becomes too large for you to squeeze all the water out. But it's only 1 gallon!

Can someone help me rationalize this?

It's hard to imagine pouring 5 gallons of water into a container and generating this type of force.

Or another crazy thought experiment is starting with gallon of water in a box with a closed top and a tall, very narrow tube on top. Now imagine the sides can slide inward to squeeze the water up. At some point the force becomes too large for you to squeeze all the water out. But it's only 1 gallon!