Mercenary
Answered

I don't know if this is classified as Biology, but:

What does PSI mean, when it is used for water pressure?

Is it a) Pressure per Square Inch?

Or, b) Pounds per Square Inch?

Verified Answer :

RAILFANwithJJ

I thinks it's pressure, because it uses the water "pressure" so I guess PSI means this.

tkulusich

B ) Pounds per square inch (:

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