What is a PA in chemistry?
A Pascal is the SI unit of pressure. A Pascal is equal to a force of one newton per square meter. 101325 pascals = 1 atmosphere. 105 pascals = 1 bar. The abbreviation for the Pascal unit is Pa.
It means that the watch seals will not allow water to enter at a depth where the water pressure is less than one atmosphere pressure which is 14 pounds per square inch ( 100 kPa ) that is equivalent to 33 feet (10 metres) of water depth. It means water resistant to 1 atmosphere.
- One atmosphere (101.325 kPa or 14.7 psi) is also the pressure caused by the weight of a column of fresh water of approximately 10.3 m (33.8 ft). Thus, a diver 10.3 m underwater experiences a pressure of about 2 atmospheres (1 atm of air plus 1 atm of water).
- 10 Meters 33 Feet 1 ATM = A watch with this resistance level is protected against accidental exposure to water; for example, splashes, perspiration or accidental immersion. It should not be exposed to any water pressure.
- Standard temperature is equal to 0 °C, which is 273.15 K. Standard Pressure is 1 Atm, 101.3kPa or 760 mmHg or torr. STP is the "standard" conditions often used for measuring gas density and volume.
I. Converting between atmospheres and millimeters of mercury. One atm. equals 760.0 mm Hg, so there will be a multiplication or division based on the direction of the change. Solution: multiply the atm value by 760.0 mmHg / atm.
- Standard temperature and pressure, abbreviated STP, refers to nominal conditions in the atmosphere at sea level. Standard temperature is defined as zero degrees Celsius (0 0C), which translates to 32 degrees Fahrenheit (32 0F) or 273.15 degrees kelvin (273.15 0K).
- Standard sea-level pressure, by definition, equals 760 mm (29.92 inches) of mercury, 14.70 pounds per square inch, 1,013.25 × 103 dynes per square centimetre, 1,013.25 millibars, one standard atmosphere, or 101.325 kilopascals.
- The pressure in outer space is so low that many consider it as non-existant. It has a pressure of 1.322 × 10−11 Pa. Pressure may be detected from the molecule of air or water hitting you. Since there is very little air and hardly ever water hitting you in space, pressure is almost zero or negligible.
Updated: 16th August 2018