The velocity of water in a river is less on the bank and large in the middle. Why?

why ice floats on water?

A boat moves in still water with a velocity which is k times less than the river flow velocity. Find the angle to the stream direction at which the boat should be rowed to minimize drifting.

A boat travels 64 km in 16 hours in favor of the current and 24 km in 8 hours against the current of the river. Find the velocity of the boat in steady water and the velocity of the current with the help of graph.

sqrt(3) times the velocity of a boat on still water is twice the velocity of current of a river. At what angle , with respect to the current, should the boat be steered so as to cross the river in least distance ?

A man swims across the river which flows with a velocity of 3 km/h due east.if the velocity of man relative to water is 4 km/h due north, then How long does he take to across the river if the river is 1 km wide?

Water is largely absorbed in

Two boats, each with velocity 8km*h^(-1) , attempt to cross a river of width 800 m. The velocity of river current is 5 km*h^(-1) . One of the boats crosses the river following the shortest path and the other follows the route in which the time taken is minimum. If they start simultaneously, what would be the time difference between their arrivals at the other bank ?

Magnetic moments of actinoids are less than that of lanthanoids. Why ?