atmospheric pressure in psi

by



The graph .mw-parser-output .ifmobile>.mobile:nth-child(2n){display:none}.mw-parser-output .ifmobile>.nomobile{display:initial}above was developed for a temperature of 15 °C and a relative humidity of 0%. Thus, a diver 10.3 m underwater experiences a pressure of about 2 atmospheres (1 atm of air plus 1 atm of water).

[10] The discrimination is due to the problematic assumptions (assuming a standard lapse rate) associated with reduction of sea level from high elevations. c p Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant.



[14] Because of this, the boiling point of water is lower at lower pressure and higher at higher pressure. ⋅ In this case, we want psi to be the remaining unit. Problem:The pressure under the ocean increases roughly 0.1 atm per meter. Answer:The pressure at a depth of 1 km is 1456.9 psi. One can calculate the atmospheric pressure at a given altitude.

where the constant parameters are as described below: Atmospheric pressure varies widely on Earth, and these changes are important in studying weather and climate. Air pressure above sea level can be calculated as.

[11] A below-sea-level surface pressure record of 1081.8 hPa (31.95 inHg) was set on 21 February 1961. See pressure system for the effects of air pressure variations on weather. It is equivalent to 760 mmHg (torr), 14.696 psi. 1 Psi (pound force per square inch) is equal to 0.06804596379 atm. At 1 km, the water pressure is 99.136 atmospheres. ≈ ( For the pressure of air in other systems, see, "Surface pressure" redirects here. The measurement was based on an instrumental observation made from a reconnaissance aircraft.[13]. Select an "Increment" value (0.01, 5 etc) and select "Accuracy" to round the result. = Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. A typical gas-using residential appliance in the US is rated for a maximum of 1/2 psi, which is approximately 14 w.g. For higher altitudes within the troposphere, the following equation (the barometric formula) relates atmospheric pressure p to altitude h: A vessel completely void of any air molecules (at sea level) would be roughly -14.7 PSIG, and ambient air pressure is always measured as 0 PSIG, regardless of whatever current barometric pressure is.

When barometers in the home are set to match the local weather reports, they measure pressure adjusted to sea level, not the actual local atmospheric pressure. 1 [9], The Dead Sea, the lowest place on Earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hPa. [17], "Air pressure" redirects here. −

Atmospheric pressure is caused by the gravitational attraction of the planet on the atmospheric gases above the surface, and is a function of the mass of the planet, the radius of the surface, and the amount and composition of the gases and their vertical distribution in the atmosphere. p Pressure on Earth varies with the altitude of the surface; so air pressure on mountains is usually lower than air pressure at sea level.

T R 0 vacuum) in a steam condenser is one such example.

Similar metric units with a wide variety of names and notation based on millimetres, centimetres or metres are now less commonly used.

The boiling point is the temperature at which the vapor pressure is equal to the atmospheric pressure around the water. [9] The highest adjusted-to-sea level barometric pressure ever recorded (below 750 meters) was at Agata in Evenk Autonomous Okrug, Russia (66°53' N, 93°28' E, elevation: 261 m, 856 ft) on 31 December 1968 of 1083.8 hPa (32.005 inHg). Converting Atmospheres to Pounds Per Square Inch (PSI). A rough approximation of elevation can be obtained by measuring the temperature at which water boils; in the mid-19th century, this method was used by explorers. R

International Civil Aviation Organization.

Average sea-level pressure is 1013.25 mbar (101.325 kPa; 29.921 inHg; 760.00 mmHg). 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). ", Atlantic Oceanographic and Meteorological Laboratory, Source code and equations for the 1976 Standard Atmosphere, A mathematical model of the 1976 U.S. Standard Atmosphere, Calculator using multiple units and properties for the 1976 Standard Atmosphere, Calculator giving standard air pressure at a specified altitude, or altitude at which a pressure would be standard, Current map of global mean sea-level pressure, Atmospheric calculator and Geometric to Pressure altitude converter, Movies on atmospheric pressure experiments from, HyperPhysics website – requires QuickTime. Conversely, 10.3 m is the maximum height to which water can be raised using suction under standard atmospheric conditions. Atmospheric pressure is thus proportional to the weight per unit area of the atmospheric mass above that location. 0 This example problem demonstrates how to convert the pressure unit atmospheres to pounds per square inch (psi). pressure in psi = (pressure in atm) x (14.696 psi/1 atm) pressure in psi = (99.136 x 14.696) psi pressure in psi = 1456.9 psi Answer: The pressure at a depth of 1 km is 1456.9 psi. [7] This is in contrast to mean sea-level pressure, which involves the extrapolation of pressure to sea-level for locations above or below sea-level. A column of air with a cross-sectional area of 1 in2 would have a weight of about 14.7 lbf, resulting in a pressure of 14.7 lbf/in2. L Pressure varies smoothly from the Earth's surface to the top of the mesosphere. 1 Psi (pound force per square inch) is equal to 0.06804596379 atm. Pressure § Surface pressure and surface tension, confirming Newton's theory of gravitation, "atmospheric pressure (encyclopedic entry)", A quick derivation relating altitude to air pressure, "Rehabilitation of hypoxemic patients with COPD at low altitude at the Dead Sea, the lowest place on earth", "Subject: E1), Which is the most intense tropical cyclone on record?



where .

Gauge pressure is measured relative to ambient atmospheric pressure. ⋅ Cooking at high elevations, therefore, requires adjustments to recipes[15] or pressure cooking.

Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth.The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa; 1,013.25 mbar), which is equivalent to 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.



M 0 psi to atm formula. M

⋅ {\displaystyle {\begin{aligned}p&=p_{0}\cdot \left(1-{\frac {L\cdot h}{T_{0}}}\right)^{\frac {g\cdot M}{R_{0}\cdot L}}\\&=p_{0}\cdot \left(1-{\frac {g\cdot h}{c_{\text{p}}\cdot T_{0}}}\right)^{\frac {c_{\text{p}}\cdot M}{R_{0}}}\approx p_{0}\cdot \exp \left(-{\frac {g\cdot h\cdot M}{T_{0}\cdot R_{0}}}\right)\end{aligned}}}.

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