Sponsored Topics. Lawrenceburg is a city in Lawrence County, Tennessee, United States. The population was 10,796 at the 2000 census. It is the county seat of Lawrence County. Lawrenceburg is southwest of Nashville and named after James Lawrence.
vacuum pressure = absolute pressure inside the vessel - absolute pressure outside the vessel, when the outside is greater than the inside. Vacuum pressure is the amount of pressure that inside the container is less than outside. Since the damage is done by a difference of pressure, the vacuum pressure means that the force is pointing to inside the container. But because the hard vacuum at 0 psi, and the outside is 14.7 psi, the vacuum can not be greater than 14.7 psi.
Gauge pressure is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure. Absolute pressure is measured with reference to an absolute (and theoretical) vacuum. For example, an ordinary pressure gauge reading of zero does not mean there is no pressure; it simply means there is no pressure in excess of atmospheric pressure. Gauge Pressure = Total Pressure â 1 atm. The conversion factor that needs to be used in order to convert between gauge pressure and absolute pressure is atmospheric pressure. By adding a pressure of 1 atmosphere to an absolute pressure, the corresponding gauge pressure can be determined. Gauge pressure is measured with the standard atmospheric pressure as the baseline. Therefore, positive gauge pressures indicate that the pressure is above atmospheric pressure. Conversely, negative pressures indicate that the pressure is below atmospheric pressure.