Question

Explain Speed of Efflux​

Answer 1

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The speed of efflux, v1,from the side of the container is given bythe application of Bernoulli's equation. ... This is accordance to Torricelli's law which states that the speed by which the fluid is flowing out of a small slit of a container is same as the velocity of a freely falling body.

Answer 2

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Suppose, the the surface of a liquid in a tank is at a height h from the orifice on its side, through which the liquid ooses out with velocities v.The speed of liquid coming call the speed of efflux.If the the dimensions of the tank be sufficiently large the velocity of the the liquid at its surface may be taken to be 0 and since the pressure their as well as at the orifice is the same as atmospheric it plays no part in the flow of the liquid which does occurs purely in consequence of the hydrostatic pressure of the liquid itself.