I saw this video on YT shorts where the guy demonstrates how it is impossible to suck water beyond 34 feet from the level it is stored at.
[This is the YT short](https://youtube.com/shorts/rWij9gJWcTg?si=5nTRvPUVFUKSaJmH)
On Google it says that the atmospheric pressure equals the pressure exerted by water column.
I don’t understand how that matters! Because in the end the guy attached a vacuum pump to pull the water up.
Also, if the water boils then it should also make steam.
Does PV=nRT apply there? I know it’s not ideal gas but for all practical purposes we use this equation.
In: Physics
Liquids are liquid because the pressure of the atmosphere smooshes them together. Nearly all liquids start boiling in vacuum until they’re all gas or their container fills up with enough vapour that the pressure is enough to keep the rest liquid.
So, if you start sucking too hard on the straw, you’ll remove enough gas that the liquid will no longer be opposed in its efforts to vaporize.
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