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It can be. If you had a glass cylinder 35 feet tall, sealed at the top and filled with water, with the base of the cylinder in an open pool of water, the vacuum at the top of the cylinder combined with the normal air pressure at the bottom could support the water up to 32 feet high, or 384 inches high. "Normal" air pressure is about 14.7 PSI (Pounds per Square Inch) , so you could use "inches of water" to measure small changes in pressure instead of measuring in PSI.

But in all my physics classes, I don't think I've ever seen anything measured that way.

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11y ago

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