Millimeters of mercury and pascals are applied to measurement of pressure. Though the pascal is also official system unit, stand-alone millimeters of mercury on the prevalence concede nothing to them. "Millimeters" even have own name - "torr" (torr) given in honor of the famous scientist Torricelli. Between two units there is an exact dependence: 1 mm Hg. = 101325 / 760 Pas which is determination of unit "mm Hg.".
It is required to you
- - calculator;
- - computer;
- - Internet.
Instruction
1. To transfer pressure set in millimeters of mercury to pascals increase the number of mm Hg. on number 101325, and then divide into 760. That is, use a simple formula: Rc = Km * 101325/760, where: Km – pressure in millimeters of mercury (mm Hg., mm Hg, torr., torr) Rc – pressure in pascals (Pa, Ra).
2. Use of the above-stated formula gives the most exact compliance between two systems of measurement. For practical calculations use simpler formula: Rc = Km * 133.322 or simply Rc = Km * 133.
3. At transfer of pressure to pascals consider that at measurement of blood pressure, in meteorological reports and also among engineers-vakuumshchikov often reduce the name "mm Hg." to "mm" (sometimes lower also millimeters). Therefore if pressure is set in millimeters or the number is simply specified, then most likely it is mm Hg. (at an opportunity, nevertheless specify). At measurement of very low pressure instead of mm Hg. "vakuumshchik" apply unit of "microns of a mercury column" which is usually designated as "micron". Respectively, if pressure is specified in microns, then just divide this number into one thousand and receive pressure in mm Hg.
4. At measurement of high pressures such unit is often applied as "the atmosphere (atm, atm) equals 760 mm Hg. That is, for obtaining pressure in mm Hg. increase quantity of the atmospheres by 760. If pressure is specified in "the technical atmospheres", then for transfer of pressure to mm Hg. increase this number by 735.56.
5. Example. Pressure in the tire of the car is 5 atmospheres. To what will this pressure expressed in pascals equal? Decision. Transfer pressure from the atmospheres to mm Hg.: 5 * 760 = 3800. Translate pressure from mm Hg. in pascals: 3800 * 133 = 505400. Answer.505400 of Pa (or 505.4 kPa).
6. If you have a computer or the mobile phone with Internet connection, then just find any online service of converting of physical units of measure. For this purpose gather in the searcher a phrase like "to transfer from mm Hg to pascals" and use instructions on the website of service.