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Force and Pressure
When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to
(a) pressure of water.
(b) gravity of the earth.
(c) shape of rubber bulb.
(d) atmospheric pressure.
(d) Atmospheric pressure.
When the air escapes from the nozzle of the dropper, it causes a pressure difference due to which water is filled into the nozzle of the dropper.
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