Question

A water tank is emptied through a pipe with an outlet 5m below the water surface level. What is the exit velocity? a) 2.1m/s b) 9.9 m/s c) -12.3m/s d)-4.8m/s e) 15.3m/s

Answer 1

The correct answer is option 'b': 9.9 m/s

Step-by-step explanation:

We know that for an ideal fluid the velocity of exit from a tank with the height of water 'h' is given by Torricelli's Law as

`v=√(2gh)`

where,

'g' is acceleration due to gravity

'h' is the level of water

Applying the given values we obtain velocity as

`v=√(2* 9.81* 5)=9.90m/s`