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how liquids exert pressure? |
Take a wide glass tube open at both ends. Tie a rubber balloon to its lower end. Pour water into the tube. You will notice that the balloon bulges downwards. This shows that liquids exert pressure on the base of the container in which they are kept. Now take a vessel with a tap-like opening at its side. Tie a balloon to the opening and fill the vessel with water. You will notice that the balloon bulges outwards. This shows that liquids exert pressure not only on the base of the container but also sideways on the walls of the container. This sideways pressure is exerted by liquids but not by solids. From this activity, we learn liquids exert pressure. |