To calculate head pressure in psi from a head height given in feet you multiply by 0.434.
15 x 0.434 = 6.51 psi
.02
1200
8
The further any Pump has to lift or push water to get it to the surface the less pressure it will be able to make as an end result. More horsepower and Impellers are required as the depth to water increases.
2.31
You can lift a locomotive or a house with 1 psi, if the pressure is applied over a large enough area.
That depends on the water pressure and the surface area that the water is pushing against.
It generally takes 2 feet of water to lift/move/carry a vehicle. Be safe- Turn Around, Don't Drown!
because the water pressure takes up some of the weight as you lift it in the water
yep
Assuming you need a metric ton, that's 1000 kilograms. To lift that, you need a FORCE of 9800 newtons. Force is related to pressure by: pressure = force / area, so the answer to the original question would depend, over what area the force is applied.
One atmosphere is the amount of pressure that can lift water approximately 10.3 meters.Considering that a diver already experiences 1 ATM of pressure in air, the water depth in meters d, at which the diver would experience n ATM of pressure, isd = (n - 1) * 10.3Hence, to experience 3 atmospheres of pressure, you'd need to go ((3-1) * 10.3) = 20.6 meters (67.6 feet) underwater.
Roughly 16 inches before the surface starts to boil from the vacuum, this is also assuming 33 degree water, the higher the water temp the less lift will be achieved due to water's vapor pressure.
Approx 2.62 hp
Any air pressure is sufficient, if you have enough area with that pressure applied. Foe example, you could lift a 10000 pound truck with 10000 psi, if you have one square inch being acted on; you could do it with 1 psi, if you had 69.5 square feet being acted on.