20 psi = 555.85 inH2O @39.2 F
The absolute pressure at 20 inches of mercury is approximately 10.3 psi (pounds per square inch). This is calculated by adding the atmospheric pressure (14.7 psi) to the gauge pressure or vacuum pressure (negative in this case) represented by the 20 inches of mercury column.
B. 10 Cubic inches The formula is: po - original gas pressure vo - original volume pf - final gas pressure vf - final volume Po*Vo = Pf*Vf or 5psi x 20 in3 = 10psi x Vf
The water pressure at 20 feet deep would be approximately 8.6 pounds per square inch (psi). This pressure increases by 0.43 psi for every additional foot in depth due to the weight of the water above.
10 m of water = 14 psi 1 m of water = 1.4 psi There is more to this... it should be as follows Pressure (P) = density of fluid (p)* gravity (g) * height of fluid (h) for example: p= ~1000 kg/m^3 (water at 20 deg C) g= ~9.81 m/s^2 (at sea level) h= 10 m of water Therefore: P=1000*9.81*10 P=~98,100 pascals (pa) = 98.1 kpa = 14.2 psi
Using Boyle's Law (P1V1 = P2V2), we can find the new pressure. P1 = 20 psi, V1 = 500 in^3, V2 = 400 in^3. P2 = (P1 * V1) / V2 = (20 * 500) / 400 = 25 psi. Therefore, the pressure when the gas is compressed to 400 cubic inches will be 25 pounds per square inch.
20 ft of head can be easily converted to psi by using the specific weight of water: 62.4 lb/ft3 and converting the units to inches. 20ft * 62.4lb/ft3 / 144in2/ft2 = 8.67 psi
10 cubic inches
1,000 psi
The absolute pressure at 20 inches of mercury is approximately 10.3 psi (pounds per square inch). This is calculated by adding the atmospheric pressure (14.7 psi) to the gauge pressure or vacuum pressure (negative in this case) represented by the 20 inches of mercury column.
Pressure and volume is not related that way, however in a home plumbing system, 20 psi would give you very poor flow in any faucet.
20
B. 10 Cubic inches The formula is: po - original gas pressure vo - original volume pf - final gas pressure vf - final volume Po*Vo = Pf*Vf or 5psi x 20 in3 = 10psi x Vf
20 inches is 1 foot and 8 inches.
5.456 cu.ft
20 inches = 1 foot and 8 inches
150 mm Hg is the same as 2.90 PSI: 1 atmosphere == 760 mm Hg, so 150 mm Hg is the same as 0.197 atm. 1 atmosphere = 14.696 PSI so (0.197)(14.696) = 2.90 PSI
20 meters = 787.4 inches.