+/- 3% of 180 psi is the range allowed from 180 psi. To calculate 3%, multiply 180 * .03, then add or subtract to/from 180:
180 * .03 = 5.4 (round off to 5)
the range is from 175 psi minimum to 185 psi maximum
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any electrode with the first two digits 60 are 60000 psi tensile strength ex a 7018 would have 70000 psi tensile strength
Inches of mercury x 0.4912 = psi
The Greek capital letter for Psi is Ψ.
If it is fresh water, and the surface is at sea level, then the pressure at the surface is 14.69 psi. As you submerge, then the pressure from the weight of the water above you is added to the air pressure above the water. For each foot that you descend, the water pressure will increase by 0.4331 psi, so at 328 feet deep, the water pressure is 142.0568 psi. Add the 14.69 psi air pressure to get 156.7468 psi.
"600 psi" is not a compression ratio; it's a pressure. For a RATIO, you need to compare TWO different numbers.