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Blood pressure fluctuation (40 mmHg) between heartbeats for a typical healthy adult [44] [45] 6.3 kPa 0.9 psi Pressure where water boils at normal human body temperature (37 °C), the pressure below which humans absolutely cannot survive (Armstrong limit) [46] +9.8 kPa +1.4 psi Lung pressure that a typical person can exert (74 mmHg) [47] 10 4 Pa
A millimetre of mercury is a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high, and currently defined as exactly 133.322 387 415 pascals [1] or approximately 133.322 pascals. [2] It is denoted mmHg[3] or mm Hg. [4][2]
Here is a similar formula from the 67th edition of the CRC handbook. Note that the form of this formula as given is a fit to the Clausius–Clapeyron equation, which is a good theoretical starting point for calculating saturation vapor pressures: log 10 (P) = −(0.05223)a/T + b, where P is in mmHg, T is in kelvins, a = 38324, and b = 8.8017.
10 −1 to 10 −7 mbar ±2.5% of reading between 10 −7 and 10 −2 mbar 2.5 to 13.5% between 10 −2 and 1 mbar Transport Pirani (Wheatstone bridge) Thermal conductivity 1000 to 10 −3 mbar (const. temperature) 10 to 10 −3 mbar (const. voltage) ±6% of reading between 10 −2 and 10 mbar Fast Transport Thermocouple (Seebeck effect ...
The types of fish to eat are categorized based on the mercury levels found in fish and the risk to human health. Mercury regulation in the United States limit the maximum concentrations of mercury (Hg) that is permitted in air, water, soil, food and drugs. The regulations are promulgated by agencies such as the Environmental Protection Agency ...
The following table lists some typical values for air at different pressures at room temperature. Note that different definitions of the molecular diameter, as well as different assumptions about the value of atmospheric pressure (100 vs 101.3 kPa) and room temperature (293.17 K vs 296.15 K or even 300 K) can lead to slightly different values ...
and for the reverse conversion: where: ppmv. = air pollutant concentration, in parts per million by volume. mg/m 3. = milligrams of pollutant per cubic meter of air. T {\displaystyle T} = atmospheric temperature in kelvins = 273.15 + °C. 0.08205.
As a nontrivial application of this rule, the SI Brochure notes [1]: 148 that the name of the unit with the symbol °C is correctly spelled as 'degree Celsius': the first letter of the name of the unit, 'd', is in lowercase, while the modifier 'Celsius' is capitalised because it is a proper name. [1]: 148