Search results
Results from the WOW.Com Content Network
1.450 38 × 10 −4 psi ... In engineering the megapascal (MPa) is the preferred unit for these uses, because the pascal represents a very small quantity.
The ground pressure of motorized vehicles is often compared with the ground pressure of a human foot, which can be 60 – 80 kPa while walking or as much as 13 MPa for a person in spike heels. [ 3 ] Increasing the size of the contact area on the ground (the footprint ) in relation to the weight decreases the unit ground pressure.
2.2 MPa (319.1 lbf/in 2) Passenger car engine (turbocharged Diesel) 2.0 MPa (290.1 lbf/in 2) Lorry engine (turbocharged Diesel) 2.4 MPa (348.1 lbf/in 2) High-speed industrial Diesel engine 2.8 MPa (406.1 lbf/in 2) Medium-speed industrial Diesel engine 2.5 MPa (362.6 lbf/in 2) Low-speed two-stroke Diesel engine 1.5 MPa (217.6 lbf/in 2)
Most locomotives operate with a steam pressure of 200 to 300 psi (1.38 to 2.07 MPa). [1] In the later years of steam, boiler pressures were typically 200 to 250 psi (1.38 to 1.72 MPa ). [ citation needed ] High-pressure locomotives can be considered to start at 350 psi (2.41 MPa), when special construction techniques become necessary, but some ...
An example of this is the air pressure in an automobile tire, which might be said to be "220 kPa (32 psi)", but is actually 220 kPa (32 psi) above atmospheric pressure. Since atmospheric pressure at sea level is about 100 kPa (14.7 psi), the absolute pressure in the tire is therefore about 320 kPa (46 psi).
Within firearms, chamber pressure is the pressure exerted by a cartridge case's outside walls on the inside of a firearm's chamber when the cartridge is fired. The SI unit for chamber pressure is the megapascal (MPa), while the American SAAMI uses the pound per square inch (psi, symbol lbf/in 2) and the European CIP uses bar (1 bar is equal to 0.1 MPa).
0.1 mPa is the lowest direct measurement of pressure that is possible with current technology. Other vacuum gauges can measure lower pressures, but only indirectly by measurement of other pressure-dependent properties. These indirect measurements must be calibrated to SI units by a direct measurement, most commonly a McLeod gauge. [22]
The SAAMI (voluntary) Maximum Average Pressure (MAP) for this cartridge is 35,000 psi (241.3 MPa) piezo pressure or (37,000 CUP). [ 20 ] [ 21 ] This is considerably lower than the C.I.P. pressure limit and is done for liability reasons, in case a 7.92×57mm Mauser "S-bore" cartridge is fired in an "I-bore" rifle that has a narrower throat and ...