It just means that the pressure you're measuring is
approximately the same as Earth's air pressure at sea level.
'Standard' atmospheric pressure is defined as 1013.25 millibars - which is equivalent to 760mm (or 29.92 inches) of Mercury - or 14.696 psi.
That's just circular : it's a self description.
I'll assume you mean atmospheric pressure, which is generally stated to be 101,325 Pascals... 101,325 Pa 101.325 kPa 760 torr 760 mmHg 1 ATM 1 bar
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.
Air pressure (at sea level) is about 1 bar; every 10 meters below the water surface, pressure increases by about 1 bar - that gives a total of 1 + 0.4 = 1.4 bar. (1 bar is about 1 atmosphere.)
Water boils at 100C at 1 ATM
1 atm (standard atmospheric pressure) is 101,325 kPa.
1 atm (standard atmospheric pressure) is 101,325 kPa.
It's a measure of pressure. Specifically, it's the amount of pressure exerted by the air in the atmosphere at sea level.
At the standard atmospheric pressure of 101325 Pa water boils exact at 100 degrees Celsius.
water boils at zero degrees then atmospheric pressure will be...........
1 atm(atmospheric pressure)=101,325pa(pascals)
14.7 psia represents standard atmospheric pressure, or 1 atm. PSIA is just psi with atmospheric pressure taken into account also.
The abbreviation STP for "Standard Temperature and Pressure."
That's just circular : it's a self description.
The atmospheric pressure (1 atm) is 101,325 Pa. In practice, it is usually approximated to 1 bar (100,000 Pa).In terms on barometric readings, it is 760 mmHg.
The pressure of freshwater increases by 1 atm for each 34 ft of depth. The pressure of seawater increases by 1 atm for each 33 ft of depth. If surface pressure is 0.97 atm, simply add that pressure to the pressure of the water. For seawater, you are exactly 1 atm below the surface... So: 1 atm + 0.97 atm = 1.97 atm For freshwater, divide 33 by 34 to get the fraction of an atmosphere you're adding to your surface pressure: 33/34 * 1 = 0.97 atm Then add that number to the surface pressure: 0.97 + 0.97 = 0.94 atm
1 ATM of pressure and 0 c is known as 'Standard temperature and pressure' (STP)