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Physics Chapter 6: Pressure - Coggle Diagram

- - - - the formula in this case is pressure= density(kg/m3) x gravitational acceleration(m/s2) x height of container(m)
        
        this formula is used to calculate the pressure exerted by a liquid at a particular height or depth
        
        according to Pascal's principal, when a pressure is applied to an enclosed liquid, the pressure is transformed uniformly to all parts of the liquid
        
        an example would be a hydraulic press, where there are 2 pistons, one big and one small, since there is a large piston, the force exerted by the large piston is very much larger than the force exerted by the small piston
- - - - measuring atmospheric pressure
        
        to measure atmospheric pressure, a manometer is used, in a manometer, which is a U-shaped glass tube with an open end connected to an open end at A, the other end B is connected to a gas supply whose pressure is to be measured using the manometer, the tube is partially filed with a liquid with p density
        
        the liquid at A is exposed to atmospheric pressure, when the gas supply is turned on, the gas will exert pressure b on the liquid at B, as b is higher than atmospheric pressure, the liquid at A will rise until the pressure at C which is on the same level as B, equals the gas pressure which is determined by taking c - a =hpg, where c is the pressure at C, and a is the pressure at A, and since the pressure b is the same as c, the pressure b is determined as a + hpg = b