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If standard equation for water pressure is p equals dgh why do all the calculators on the internet seem to uses p equals dh What is going on Which way is correct?
Austinwilcox
To get pressure at given depth: P = rho x depth rho is weight density, say lb/in^3. For water, that is about .0361 depth is the depth, say in inches. P is the pressure. Using the units described for the other measurements, it comes out lb/in^2, or PSI for short. The difficulty with most calculations like this is making sure your units are all consistent.
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