question_answer

Water is flowing continuously from a tap having an internal diameter \[8\times {{10}^{-3}}m\]. The water velocity as it leaves the tap is \[0.4\,m{{s}^{-1}}\]. The diameter of the water stream at a distance \[2\times {{10}^{-1}}m\] below the tap is close to                                                                                                  [AIEEE 2011]

A)  \[3.6\times {{10}^{-3}}m\]

B)                  \[5.0\times {{10}^{-3}}m\]

C)  \[7.5\times {{10}^{-3}}m\]      

D)       \[9.6\times {{10}^{-3}}m\]   

Correct Answer: A

Solution :

[a]

Also,