what is atmospheric pressure in atm
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- The standard atmosphere (symbol: atm) is a unit of pressure equal to 101325 Pa or 1013.25 hectopascals or millibars. Equivalent to 760 mmHg (torr), 29.92 inHg, 14.696 psi. (The pascal is a newton per square meter or in terms of SI base units, kilogram per meter per second-squared.).ne atmosphere (101 kPa or 14.7 psi) is the pressure caused by the weight of a column of fresh water of approximately 10.3 m (33.8 ft).
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Atmosphere Atmospheric pressure is the force per unit area that is always applied perpendicularly to a surface by the surrounding gas. It is determined by a planet's gravitational force in combination with the total mass of a column of gas above a location. On Earth, units of air pressure are based on the internationally recognized standard atmosphere (atm), which is defined as 101,325 Pa (760 Torr or 14.696 psi).
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Atmospheric pressure One atmosphere (101 kPa or 14.7 psi) is the pressure caused by the weight of a column of fresh water of approximately 10.3 m (33.8 ft).he boiling point is the temperature at which the vapor pressure is equal to the atmospheric pressure around the water. Because of this, the boiling point of water is lower at lower pressure and higher at higher pressure.
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Atmospheric pressure diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure). Atmospheric pressure is the pressure above any area in the Earth's atmosphere caused by the weight of air. Standard atmospheric pressure (atm) is discussed in the relevant section.
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atm â Standard Atmosphere Pressure Unit The standard constant value used for atmospheric pressure at sea level is 1 atm (standard atmosphere) which equals 101325 pascals in SI units, and is equivalent to 29.9213 inches of mercury.he standard atmosphere value has many uses in atmospheric calculations and one example of this is the FAA procedures for setting aircraft altimeters at altitudes of 18,000 feet and above to ensure all aircraft are using the same pressure reference when measuring the height above sea level.
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Atmospheric Pressure: Definition & Effects Atmospheric pressure is the weight of the atmosphere on a surface. The units for atmospheric pressure are conveniently known as atmospheres (atm) and the average pressure at sea level is set at 1 atmosphere (atm). On average, the weight of the atmosphere on a square inch is 14.7 pounds at sea level.
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- A not-commonly-used measurement is 'atmosphere'. One atmosphere is the average pressure at sea-level: 101.325 kPa, 1013.25 mbar, 29.921 inches of mercury (inHg) or 760 millime … ters of mercury (mmHg).tmospheric pressure refers to the force per unit area exerted  against a surface by the weight of air above that surface in the  Earth's atmosphere. The standard atmosphere … (symbol: atm) is a unit  of pressure at sea level and is equal to 101325 Pascal.
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Pascal (unit) The unit of measurement called standard atmosphere (atm) is defined as 101,325 Pa and approximates to the average pressure at sea-level at the latitude 45° N. Meteorological reports typically state atmospheric pressure in hectopascals.
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- Standard atmospheric pressure is 101,325 pascals = 1,013.25 hPa = 101.325 kPa. Important to know: 1 Pa = 1 N/m2 ≡ 94 dBSPL and 1 bar = 105 Pa. 1 kPa = 103 Pa = 1000 Pa = 1000 N/m2 ≡ 154 dBSPL. Conversion of sound units: pascals to dBSPL. Pressure = force / area p = F / A. Please enter two values, the third value will be calculated.
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- The standard atmosphere (symbol: atm) is a unit of pressure equal to 101325 Pa or 1013.25 hectopascals or millibars. Equivalent to 760 mmHg (torr), 29.92 inHg, 14.696 psi. (The pascal is a newton per square meter or in terms of SI base units, kilogram per meter per second-squared.).he boiling point is the temperature at which the vapor pressure is equal to the atmospheric pressure around the water. Because of this, the boiling point of water is lower at lower pressure and higher at higher pressure.
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- Therefore, at a depth of 33 feet (10 meters) beneath the sea surface, the total ambient pressure is about 29.4 psi, or 2 ATM -- 1 ATM caused by the weight of the air in Earth's atmosphere, plus 1 ATM for the weight of 33 feet (10 meters) of seawater.
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What is the air pressure at sea level? Unfortunately for the student, there are many, many different units for measuring atmospheric pressure. Standard air pressure at sea level is most easily defined as 1 atmosphere, or 1 atm. In terms of an international (ISO) standard, it is defined to be 101325 Pa or 101.3 kPa (kilo-Pascals) at a temperature of 15 °C.
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Atmospheric pressure Atmospheric pressure is the pressure exerted by the weight of air in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point.ne atmosphere (101 kPa or 14.7 psi) is the pressure caused by the weight of a column of fresh water of approximately 10.3 m (33.8 ft).
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atmosphere 1. the entire gaseous envelope surrounding the earth and subject to the earth's gravitational field. 2. the air or climate in a particular place. 3. a unit of pressure, being that exerted by the earth's atmosphere at sea level; equal to 1.01325 × 105 pascals (approximately 760 mm Hg). Abbreviated atm.
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What is normal atmospheric pressure at sea level? Matthew Bennett, BSc in Physics from UC in Christchurch, New Zealand. Views. Atmospheric pressure at sea level is approximately 100,000 pascals (101,325 Pa by definition.) Air pressure is usually measured in hectopascals (hPa), the hecto prefix corrsponding to 100 (a hecatre is a square with 100m sides), so 1 atmosphere is approximately 1000 hPa. A pascal is the SI unit for pressure, defined as 1 newton per square metre.
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- The unit of measurement called atmosphere or standard atmosphere (atm) is 101325 Pa (101.325 kPa). This value is often used as a reference pressure and specified as such in some national and international standards, such as ISO 2787 (pneumatic tools and compressors), ISO 2533 (aerospace) and ISO 5024 (petroleum).he pascal (Pa) or kilopascal (kPa) as a unit of pressure measurement is widely used throughout the world and has largely replaced the pounds per square inch (psi) unit, except in some countries that still use the Imperial measurement system, including the United States.
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- The atmospheric pressure at sea level is also conveniently set at 1 atmosphere, or atm for short. One atmospheric pressure (1 atm) is equal to 14.7 pounds per square inch (psi) . The atmospheric pressure drops to almost zero 30 kilometers up in the atmosphere.To unlock this lesson you must be a Study.com Member.he atmospheric pressure at sea level is also conveniently set at 1 atmosphere, or atm for short. One atmospheric pressure (1 atm) is equal to 14.7 pounds per square inch (psi) . The atmospheric pressure drops to almost zero 30 kilometers up in the atmosphere. To unlock this lesson you must be a Study.com Member.
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Atmospheric pressure Atmospheric pressure. Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point.
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Atmospheric pressure Pressure measures force per unit area, with SI units of pascals (1 Pa = 1 N/m2). On average, a column of air one square centimetre [cm2] (0.16 sq in) in cross-section, measured from sea level to the top of the Earth's atmosphere, has a mass of about 1.03 kilograms (2.3 lb) and weight of about 10.1 newtons (2.3 lbf).
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atmospheric pressure 1. the pressure exerted by the earth's atmosphere at any given point. 2. a value of standard or normal atmospheric pressure, equivalent to the pressure exerted by a column of mercury 29.92 in. (760 mm) high, or 1013 millibars (101.3 kilopascals). Also called barometric pressure.
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Atmospheric pressure Atmospheric pressure is the pressure above any area in the Earth's atmosphere caused by the weight of air. Standard atmospheric pressure (atm) is discussed in the relevant section.tmospheric pressure is the pressure above any area in the Earth's atmosphere caused by the weight of air. Standard atmospheric pressure (atm) is discussed in the relevant section.
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Atm (Atmosphere) To/From Torr (mmHg) Conversion 1 mmHg = 0.00131578947 Atm Atmospheric pressure is the force per unit area by the weight of air above that point. Torr is a pressure of fluid from 1 millimeter of mercury.
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- 760 mmHg = 760 torr = 1.00 atm = 101,325 Pa = 101.325 kPa. If you need help setting up the conversions between pressure measurements, please refer back to the Mole section which also explains how to set up dimensional analysis. Volume: the numerical amount of space occupied by a solid, liquid, or gas.
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Atmosphere (unit) Scuba divers and others use the word atmosphere and atm in relation to pressures that are relative to mean atmospheric pressure at sea level (1.013 bar). For example, a partial pressure of oxygen is calibrated typically using air at sea level, so is expressed in units of atm.The old European unit technical atmosphere (at) is equal to 1 kilogram-force per square centimetre (kgf/cm 2), 7004980665000000000♠98066.5 Pa.or example, a partial pressure of oxygen is calibrated typically using air at sea level, so is expressed in units of atm. The old European unit technical atmosphere (at) is equal to 1 kilogram-force per square centimetre (kgf/cm 2), 7004980665000000000♠98066.5 Pa.
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Convert atm to kPa Now, let’s move on to the atmosphere or atm unit. The standard atmosphere unit is assumed constant. It is equal to the typical air pressure measured at the earth mean sea level. One standard atmosphere or atm is equal to 101,325 pascals or 101.325 kPa or 1,013.35 hPa.