Water is flowing continuously from a tap having an internal diameter 8 10⁻³ ~m . The water velocity as it leaves the tap is 0.4 ~ms ⁻¹ . The diameter of the water stream at a distance 2 10⁻¹ ~m below the lap is close to :

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Correct answer: C. 3.6 10⁻³ ~m

Equation of continuity aligned & ( a v ) top =( a v ) bottom & v _ b ^2-(0.4)^2=2 9.8 0.2 [ v ^2- u ^2=2 gh is used ] & v _ b =2 ~m / s (nearly) & [8 10⁻³ ] 0.4= d ^2 4 & ~d 3.6 10⁻³ ~m aligned

Water is flowing continuously from a tap having an internal diameter 8 10⁻³ ~m . The water velocity as it leaves the tap is 0.4 ~ms ⁻¹ . The diameter of the water stream at a distance 2 10⁻¹ ~m below the lap is close to :

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