1. The problem statement, all variables and given/known data The velocity of efflux of a liquid through an orifice in the bottom of the tank does not depend upon: A. Size of orifice B. Height of the liquid C. Acceleration due to gravity D. Density of the liquid 2. Relevant equations 3. The attempt at a solution My textbook says that Vefflux=√2gH. The answer given is size of orifice. How is it dependent on density? Also, if I take a very very small orifice and then a very large orifice, will the velocity be same? Does density vary for large H?