State Archimedes' principle with diagram | deeps knowledges

                       Archimedes' Principle
Archimedes' principles state's that when an object is immersed in a liquid partially or completely it looses the weight equal to the weight of displaced liquid or upthrust acting on it, i.e. loss of weight in liquid =weight of displaced liquid =up thrust take a stone and tie to the hook of spring balance and measure it weight in air. Suppose the weight of stone is W1. Take an the overflow can filled with water up to it's spout. Place an empty beaker just under the spout of the can on the top of pan balance and note it's weight W2. The stone is then immersed in the water of overflow can and measure it's weight in water. Suppose W3.the water which is displaced by the stone is collected into the beaker . Suppose the weight of displaced liquid with beaker W4. Now here,
loss of weight in water= up thrust =W1-W3
Weight of displaced liquid =weight of the beaker and water -weight of beaker=W4-W2
here,   W1-W3=W4-W2
This way, the atmospheric pressure is measured . At sea level the height of mercury is recorded 760 mm. So it is called atmospheric pressure at sea level is 760mmHg.
Archimedes' principle

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