How Tall Must a Water Column Be to Generate 100mmHg Pressure?

AI Thread Summary
To generate a pressure of 100 mmHg, a column of water must be approximately 1.36 kilometers tall. The calculation uses the equation P = pgh, where pressure is converted from mmHg to Pascals. The density of water is assumed to be 1 kg/m³, and the gravitational acceleration is 9.81 m/s². The conversion factor from mmHg to Pa is also applied in the calculation. This height seems excessive, prompting a reconsideration of the density value used.
tandoorichicken
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Homework Statement


I feel like I'm doing something seriously wrong here.:rolleyes:

How tall must a column of water be to generate a pressure of 100mmHg?

Homework Equations


P = pgh, I think, is the only necessary equation.


The Attempt at a Solution



So... 100mmHg = 1 kg/m3 * 9.81 m/s2 * 1mmHg/133.322Pa * h

h = 1.36 km?

Seems a bit much, don't you think?
 
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tandoorichicken said:
So... 100mmHg = 1 kg/m3 * 9.81 m/s2 * 1mmHg/133.322Pa * h
What's the density of water again? :wink:
 

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