Water and mercury are filled in two cylindrical vessels up to same height. Both vessels have a hole in the wall near the bottom. The velocity of water and mercury coming out of the holes are v1 and v2 respectively.
(a) v1= v2
(b) v1 = 13.6v2
(c) v1 =v2 /13.6
(d) v1 = √(13.6 v2).