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5 votes
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?

2 Answers

5 votes
B ) Pounds per square inch (:
User Yokiijay
by
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1 vote
I thinks it's pressure, because it uses the water "pressure" so I guess PSI means this.
User Wil W
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