Re: Head Table Seating at Rehearsal Dinner. I've been to sit-down-wherever rehearsal dinners, I've been to arranged-seating rehearsal dinners, I've been to roving heavy hors d'oeuvre rehearsal dinners in which you never really sit down for any length of time .
A: The normal air pressure at sea level is 14.7 pounds per square inch. Standard atmospheric pressure can also be expressed using different units, including 1013.25 millibars, 1013.25 hectoPascals, 760 millimeters of mercury and 29.92 inches of mercury. Continue Reading
Determining Altitude. Since pressure varies with altitude, you can use a pressure sensor to measure altitude (with a few caveats). The average pressure of the atmosphere at sea level is 1013.25 hPa (or mbar). This drops off to zero as you climb towards the vacuum of space.