The speed of water in a river is 4 kmph and the speed of boat in still water is 8 kmph.
If the same boat is used to travel a distance of 16km in the river from A to B
downstream and back from B to A.Find the total time taken by the boat(in Hr)
In a DNA segment having six coils, there are 22 nitrogen base pairs linked by two hydrogen bonds. How many cytosine bases are found in that segment ?
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A 2 kg ball moving at 24 m/s undergoes inelastic head on
collision with a 4kg ball moving in opposite direction at 48 m/s .If e=2/3 ,then
the magnitude of their relative velocity in m/s after collision is
A mass is whirled in a circular path with a constant angular velocity and its angular momentum is L. If the string is now halved keeping the angular velocity the same , the angular momentum is : A)L/4 B)L/2 C)L D)2L