Measuring Pulmonary Capacity

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Blowing into a water manometer is a simple way to determine a person's pulmonary capacity. The pressure in the manometer is , where is the density of water, is the gravitational acceleration, and is the difference of the height of the water in the two columns; adding the atmospheric pressure , equal to , gives the total pressure to raise the water column.

Contributed by: Enrique Zeleny (March 2011)
Open content licensed under CC BY-NC-SA




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