Answer:
The correct answer is 'velocity'of liquid flowing out of an orifice is proportional to the square root of the 'height' of liquid above the center of the orifice.
Explanation:
Torricelli's theorem states that
[tex]v_{exit}=\sqrt{2gh}[/tex]
where
[tex]v_{exit}[/tex] is the velocity with which the fluid leaves orifice
[tex]h[/tex] is the head under which the flow occurs.
Thus we can compare the given options to arrive at the correct answer
Velocity is proportional to square root of head under which the flow occurs.
