describe the construction of simple barometer
Answers
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather. Numerous measurements of air pressure are used within surface weather analysis to help find surfacetroughs, high pressure systems and frontal boundaries.
Barometers and pressure altimeters (the most basic and common type of altimeter) are essentially the same instrument, but used for different purposes. An altimeter is intended to be transported from place to place matching the atmospheric pressure to the corresponding altitude, while a barometer is kept stationary and measures subtle pressure changes caused by weather. The main exception to this is ships at sea, which can use a barometer because their elevation does not change. Due to the presence of weather systems, aircraft altimeters may need to be adjusted as they fly between regions of varying normalized atmospheric pressure.
Italian physicist, Evangelista Torricelli (1608-47) invented the barometer. It is an instrument for measuring atmospheric pressure. The common unit, in which atmospheric pressure is usually mentioned in one atmosphere. It is the average pressure, which is exerted by the atmospheric pressure, at the sea levelit is equal to the pressure exerted by a column of Mercury height 76 cm and temperature of zero degree celsius when it is kept at sea level.