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Mass of the pulley is m & radius is R. A...

Mass of the pulley is `m` & radius is `R`. Assume pulley to be uniform disc. Pulley is free to rotate about an axis passing through its centre and perpendicular to its plane. String is massless & inextensible. String is wrapped on the pulley. There is no slipping between string and pulley. The length of the string which is not wrapped on the pulley is `2R`. Block of mass `m` is released from the position as shown in the figure. The impulse exerted by the string on the pulley at the moment string becomes taut is `J`. `(2msqrt(gR))/J` is equal to

A

In freezing solvent (liquid) `hArr` solvent (solid) and solute (liquid) `hArr` solute (solid) equilibrium exists.

B

Concentration of isotonic solutions must be equal

C

Blood cells collapse when suspended in saline water

D

Ionic reactions are example of fast reactions

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