question_answer

Water enters through end A with speed \[{{v}_{1}}\] and leaves through end B with speed \[{{v}_{2}}\] of a cylindrical tube AB. The tube is always completely filled with water. In case I tube is horizontal and in case II it is vertical with end A upwards and in case III it is vertical with end B upwards. We have \[{{v}_{1}}={{v}_{2}}\] for

A)            Case I                                      

B)            Case II                                     

C)            Case III                                   

D)            Each case