Barometers |
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 Barometers are instruments to measure the pressure of the atmosphere. The barametric pressure tell us the weight of air pushing down. This can be affected by several things like how cold or hot the air is and how high the column of air is The line that separates the high readings and the low readings is traced on the map and is called a "front". It is termed as "cold front" if the line of demarcation moves approximately north to south and termed as "warm front" if the line of pressure differences moves south to north.There are a number of ways to measure the pressure of the atmosphere using barometers. Barometers are of different types like Liquid barometers,mercury barometers,aneroid barometers etc. An aneroid barometer indicates pressure on a dial using a needle that is mechanically linked to a partially evacuated chamber, which responds to pressure changes. |
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