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Air pressure is the weight of air pressing down on the earth it is measured by a barometer what kind of weather does high pressure usually bring?
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∙ 12y ago
humidity
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∙ 12y ago
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What does it mean when the straw moves up barometer air pressure?
If you have taped a straw to a balloon stretched over a jar top as a simple barometer, when the straw moves up, this is a sign of high pressure (atmosphere pressing down on the balloon). High pressure usually means fine weather.
What is use to measure atmosphere pressure?
Standard atmospheric pressure at sea level is taken as 1 atmosphere for all intensive purposes. Atmospheric pressure near to the surface of the earth is about 1 atm. If we go above it decreases and increases we move towards the center of the earth.
What instruments are used to measure the atmospheric pressure?
Usually the instrument used is called a barometer- which could be a closed end manometer or an aneroid barometer.An altimeter actually also measures atmospheric pressures - but for a different purpose.
How does a barometer measure humidity?
It doesn't, it measures atmospheric pressure. Humidity is measured with a hygrometer.* Some long case mercurial barometers, used in the home, may have a separate hygrometer included on the instrument.
What does a decrease in the height of the mercury column usually indicate on a barometer?
low pressure system and stormy weather
What unit of measurement does an barometer use?
Barometric pressure is usually measured in inches of mercury, millibars (mb), or hectoPascals (hP).
What does it mean when the straw moves up barometer air pressure?
If you have taped a straw to a balloon stretched over a jar top as a simple barometer, when the straw moves up, this is a sign of high pressure (atmosphere pressing down on the balloon). High pressure usually means fine weather.
What is use to measure atmosphere pressure?
Standard atmospheric pressure at sea level is taken as 1 atmosphere for all intensive purposes. Atmospheric pressure near to the surface of the earth is about 1 atm. If we go above it decreases and increases we move towards the center of the earth.
What instruments are used to measure the atmospheric pressure?
Usually the instrument used is called a barometer- which could be a closed end manometer or an aneroid barometer.An altimeter actually also measures atmospheric pressures - but for a different purpose.
How can you determine air pressure?
Air pressure is usually measured using a barometer. This device usually has mercury inside it along a tube that is a compete vacuum. As the air pressure rises the pressure of the air pushes down on the mercury and forces it to rise further into the vacuum. 760 mm of mercury is considered to be 1 atmosphere. For very high pressures an aneroid barometer is used. This has wafers inside that are compressed under high pressure that give a reading.
What is Barometer Rising?
It means that the pressure is increasing. High pressure usually brings stable, fine weather.
How does a barometer measure humidity?
It doesn't, it measures atmospheric pressure. Humidity is measured with a hygrometer.* Some long case mercurial barometers, used in the home, may have a separate hygrometer included on the instrument.
What does a decrease in the height of the mercury column usually indicate on a barometer?
low pressure system and stormy weather
What does a rising barometer tell you?
Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column.
How can pressure help us predict weather?
Low pressure usually bring lousy weather. A barometer measures atmospheric pressure. High pressure is associated with good weather low pressure with bad weather
What can a barometers be used for?
A barometer measures barometric pressure, that is, atmospheric pressure. Because air flows from high pressure areas to low pressure areas, rising or falling barometric pressure tells us that we should expect a change in the weather. For example, a storm is often preceded by a drop in barometric pressure. A barometer is an indispensable tool for a meteorologist, a captain of a ship, or anyone else who needs to predict the weather.
What is the instrument used to detect a change in atmosphere pressure which usually signals a change in weather QUICK I NEED the answer sooon?
Barometer
