atmospheric pressure definition of atmospheric
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atmospheric pressure atmospheric pressure. noun, Meteorology. 1. the pressure exerted by the earth's atmosphere at any given point, being the product of the mass of the atmospheric column of the unit area above the given point and of the gravitational acceleration at the given point.
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atmospheric pressure a value of standard or normal atmospheric pressure, equivalent to the pressure exerted by a column of mercury 29.92 inches (760 mm) high, or 1013 millibars (101.3 kilopascals).
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Air Pressure (Lauren) Air Pressure can be defined as the pressure of air in the earths atmosphere. It reaches a maximum of about. 100,000 Pa near sea level and decreases as altitude increases. More simply, it is the force exerted by the weight of the air. Even though air molecules are invisible, they still have mass and take up space.
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Pressure system A pressure system is a region of the Earth's atmosphere where air pressure is a relative peak or lull in the sea level pressure distribution. The surface pressure at sea level varies minimally, with the lowest value measured 870.0 hectopascals (25.69 inHg) and the highest recorded 1,085.7 hectopascals (32.06 inHg).
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Atmospheric and Gauge Pressure In another lesson, we defined pressure as the force per unit area, and gave the SI units as Newtons per meter squared, or Pascals. There are actually a couple of different ways to measure pressure based on our frame of reference. We will further define pressure in terms of absolute pressure and gauge pressure. 1  Absolute pressure: The total pressure exerted on a system referenced to zero Pascals, and equal to the gauge pressure plus atmospheric pressure. Gauge Pressure: Pressure referenced to one atmosphere, and is the pressure actually shown on the dial of a gauge that registers pressure relative to atmospheric pressure. For example, an ordinary pressure gauge reading of zero does not mean there is no pressure, it means there is no pressure in excess of atmospheric pressure. Atmospheric Pressure: The pressure exerted by the weight of the atmosphere. Absolute pressure = gauge pressure + atmospheric pressure. Units of pressure - in the SI ...
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Pressure Normal atmospheric pressure is defined as 1 atmosphere. 1 atm = 14.6956 psi = 760 torr. Torr (torr) Based on the original Torricelli barometer design, one atmosphere of pressure will force the column of mercury (Hg) in a mercury barometer to a height of 760 millimeters.
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Atmosphere Atmospheric pressure is the force per unit area that is 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 kPa (760 Torr or 14.696 psi). It is measured with a barometer.
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- Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air above that surface.In the diagram below, the pressure at point X increases as the weight of the air above it increases.t sea level, the weight of the air above this unit area would (on average) weigh 14.7 pounds! That means pressure applied by this air on the unit area would be 14.7 pounds per square inch. Meteorologists use a metric unit for pressure called a millibar and the average pressure at sea level is 1013.25 millibars.
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atmospheric pressure Define atmospheric pressure. atmospheric pressure synonyms, atmospheric pressure pronunciation, atmospheric pressure translation, English dictionary definition of atmospheric pressure. n. Pressure caused by the weight of the atmosphere. It has a mean value of one atmosphere at sea level but reduces with increasing altitude. Also called...
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Atmospheric pressure 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 of gas and its vertical distribution in the atmosphere.
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- The atmospheric pressure is the weight exerted by the overhead. atmosphere on a unit area of surface. It can be measured with a. mercury barometer, consisting of a long glass tube full of mercury. inverted over a pool of mercury: Figure 2-1 Mercury barometer. When the tube is inverted over the pool, mercury flows out of the.
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Atmospheric Pressure Atmospheric pressure is the force that the weight of air exerts on a surface. It is usually estimated through hydrostatic pressure, which is produced by the total weight of air above the spot to be measured. This type of pressure can be applied in many industrial processes, including corrosion protection.
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Atmosphere Definition (Science) Definition: Atmosphere refers to the gases surrounding a star or planetary body held in place by gravity.Atmosphere is also a unit of pressure. One atmosphere (1 atm) is defined to be equal to 101,325 Pascals.efinition: Atmosphere refers to the gases surrounding a star or planetary body held in place by gravity.
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Atmospheric Pressure: Definition & Facts Enter the barometer. Atmospheric pressure is the force per unit area exerted by the weight of the atmosphere. To measure that weight, meteorologists use a barometer. It was Evangelista Torricelli, an Italian physicist and mathematician who proved in 1643 that he could weigh the atmosphere against a column of mercury.nter the barometer. Atmospheric pressure is the force per unit area exerted by the weight of the atmosphere. To measure that weight, meteorologists use a barometer. It was Evangelista Torricelli, an Italian physicist and mathematician who proved in 1643 that he could weigh the atmosphere against a column of mercury.
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Pressure Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure) is the pressure relative to the local atmospheric or ambient pressure.Various units are used to express pressure.he SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m 2 or kg·m −1 ·s −2). This name for the unit was added in 1971; before that, pressure in SI was expressed simply in newtons per square metre. Other units of pressure, such as pounds per square inch and bar, are also in common use.
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air pressure Definition of air pressure. : pressure exerted by air: a : atmospheric pressure b : the pressure within a container due to the compression of atmospheric gases Air pressure in the car tire was measured in pounds per square inch.
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Atmospheric Pressure: Definition & Effects An atmosphere is the unit for atmospheric pressure, and sea level is set at 1 atmosphere (atm). The atmospheric pressure at any given point depends on two factors: altitude (the height of a thing in relation to sea level) and temperature (the intensity of heat).
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Atmospheric pressure Measurement based on depth of water. 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). Thus, a diver 10.3 m underwater experiences a pressure of about 2 atmospheres (1 atm of air plus 1 atm of water).
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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 The 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 Pressure is generally measured in units of Pascals. Atmospheric scientists, however, like to express pressure in units of bars. For the record, 1 Pascal = 1 Newton per square meter, and 1 bar = 100,000 Pascals. The average atmospheric pressure at the surface of the Earth is approximately 1 bar.
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Atmosphere Definition (Science) Definition: Atmosphere refers to the gases surrounding a star or planetary body held in place by gravity. Atmosphere is also a unit of pressure. One atmosphere (1 atm) is defined to be equal to 101,325 Pascals. Up Next. Up Next. Article. Practice Converting Pascals to Atmospheres with an Example Problem.
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Pressure Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure)[a] is the pressure relative to the ambient pressure.
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What is Barometric Pressure? Barometric pressure is the weight of the overlying air pressing down on the earth. It is also known as air pressure. Low barometric pressure means the overlying air is rising, whereas high pressure means the overlying air is sinking. Barometric pressure has important effects on water chemistry and weather conditions.
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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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Into Thin Air Atmospheric pressure (measured with a barometer) is simply a measure of the weight of a column of air above a point. The more air above the point, the greater the pressure. At sea level, the entire atmosphere is above and pressure is greatest. The average (mean) sea level pressure is 29.92 in Hg (1013 hPa).