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Introductory Physics Homework Help
Pressure at same height in same fluid?
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[QUOTE="CWatters, post: 6000163, member: 423469"] Yes. When we think about the pressure under water we sometimes ignore the effect of the air above because it's roughly the same everywhere but that's not always valid. Changes in the air pressure above the water changes the pressure below the water. This can cause the sea to rise and fall in different places (an example is a storm surge). Consider the pressure at the bottom of the tank. It must be the same pressure on the left as the right or fluid would flow horizontally. However the depth of water on the right is greater than that on the left by 2m. So something must be equalising the pressure at the bottom OK? Imagine if the tank was open at the top. The water on the right would fall until it was equal both sides. So something else must be preventing this and equalising the pressure at the bottom. One way to think of it is that the water has already fallen a bit on the right and risen on the left. This increased air pressure on the left and reduced pressure on the right is what causes the pressure at the bottom to be equal. [/QUOTE]
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Introductory Physics Homework Help
Pressure at same height in same fluid?
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