question_answer

A tank filled with fresh water has hole in its bottom and water is flowing out of it. If the size of the hole is increased what will be the change in: (a) Volume of water flowing out per second? (b) Velocity of the out coming water? (c) If in the above tank, the fresh water is replaced by sea water, will the velocity of out coming water change?

Answer:

                (a) The volume of water flowing out per sec will increase as its volume depends directly on the size of hole. (b) The velocity of outflow of water remains unchanged because it depends upon the height of water level and is independent of the size of the hole. (c) No, though the density of sea water is more than that of fresh water, but the velocity of outflow of water is independent of the density of water.