If sea level is 0, then above sea level are positive elevations and below sea level are negative elevations.
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.
A barometer is a instrument used to measure air pressure
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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.
elevation above sea level . . . barometer or GPS air temperature . . . thermometer air pressure . . . barometer
If sea level is 0, then above sea level are positive elevations and below sea level are negative elevations.
1
the dead sea is 1,365 feet deep.
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The elevation of Karachi, Pakistan, is about 26 feet, or about 8 meters. Use the link below to confirm the data and learn more.
how do meteorologist use a barometer
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Polder
Use positive numbers for altitudes above sea level, zero is sea level itself, and negative numbers for altitudes below sea level. As for the picture, use a number line - but make vertical instead of using the commonly used horizontal position.
We can use negative numbers and positive numbers in: Sea level- If the sea level is below or above the ground Money- If you are in debt with someone Temperature- If the temperature is below or above 0 Points- If you are winning or losing someone Weight- If you loss or gain weight Maps- If you are going north, south, east or west Time- If you arrive early or late Floors- If you are below ground level or above ground level