water flows through a hose pipe whose internal diameter is 2 cm at a speed of 1 m/s.calculate the diameter of the nozzle if the water is to emerge at a speed of 4m/s
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Explanation:
From continuity equation: A1V1 = A2V2
=> Π(1)^2 ×1 = 4 ×Πr^2
=> 1/4 = r^2 => r = 1/2 cm
So, diameter of the nozzle => 1/2 × 2 cm = 1cm.
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