Atmospheric pressure will support a column of Mercury to about 760 mm.
Mercurial air pressure is described as '760 mmHg'.
As air pressure changes , the height of this column will also change.
If you did it with water, the column would have to be about 34 feet (10.2 metres) in height.
The common method to measure atmospheric pressure employs an inverted column submerged in a fluid to determine the level at which the column has to be raised to equalize the external atmospheric pressure and the internal column pressure. The height at which the fluid inside the column ceases to increase is correlated to atmospheric pressure. Due to mercury's high density, this level is on the order of inches (~30 inches of mercury at atmospheric pressure). If water were to be used the column would have to be ~32 feet tall in order to develop the equalized pressures between the column and atmosphere.
Minuscule, since Mercury doesn't have a substantial atmosphere.
The surface pressure of mercury is very low, almost zero since it has no sustainable atmosphere due to it's size. It's almost a vacuum.
For all intense Mercury doesn't have an atmosphere.
Absolute pressure is simply the addition of the observed gage pressure plus the value of the local atmospheric pressure.
bacuse the experiment proved with the help of barometer..the value was 76mmhg.at wich the atmospheric presure and the pressure in vessel coincide...
The balloon exists in a separate pressure system from the bell jar itself.As the balloon is open to the surrounding air, the pressure within the balloon is 1 atm (1 atmospheric unit of pressure = 105 Pa).When pressure is decreased within the jar, the pressure within the jar decreases to a value lower than 1 atm. Therefore, to counter the low pressure created in the jar, the atmospheric air moves into the balloon and pushes the balloon into the jar to attempt to equalize the pressure in the balloon and in the jar. Therefore the balloon inflates.
33.8637526 1 Bar is an arbitrary "standard atmospheric pressure" which is roughly 29 and a half inches of mercury. If you multiply the inches-of-mercury value by 33.8637526 you get the pressure in millibars
i think mercury has high value density and its density depend on temperature for small size volumes, it is suitable (little change of mercury volume result significant mass value & easy Measurable) saeedhoseini
85 kPa
The standard atmospheric pressure is the air pressure of 101325 pascals (Pa) or 101.325 kilopascals (kPa) (1013.25 millibars), exerted by a 760 millimeter (29.92 inches) column of mercury at sea level at a temperature of 0 degrees Celsius.
Absolute pressure is simply the addition of the observed gage pressure plus the value of the local atmospheric pressure.
about 100,000 newton per metre square. =)
Absolute pressure is simply the addition of the observed gage pressure plus the value of the local atmospheric pressure.
No. We need to know exactly what is meant by gage here. A piston tyre gauge measures pressures relative to atmospheric. A mercury barometer measures absolute pressure. A gauge that involves uncoiling of a coiled tube will measure absolute pressure (it will have to be calibrated). But a manometer which is open to the atmosphere on one arm will measure pressures relative to atmospheric pressure so the real pressure is the two added together.
760 mm Hg is 1 atmosphere, so approx 1 bar. It is 1.013 bar, which is 1013 milibars.
Standard air pressure at sea level is 1 atmosphere, or 1 atm. This is the adopted standard atmosphere value, but sea level pressure will not always equal to this value due to changes in weather. 1 atm = 101 325 pascals = 1.01325 bars.
Isobar for atmospheric pressure, isotherm for temperature, or contour for height above (below) sea level.
A couple of reasons: surfactant - a detergent - reduces surface tension to a negative value. the plura contains a "vacume" (lower pressure than atmospheric) and pulls the lungs to the chest wall. venous blood partial gas pressure is sub atmospheric.
bacuse the experiment proved with the help of barometer..the value was 76mmhg.at wich the atmospheric presure and the pressure in vessel coincide...
Because of the Dalton's Law. pressure total= pressure1+pressure2