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when the tube of insufficent length is inserted in the liquid, the liquid does not spurts out. Is this due to change in contact angle or what

the point that somebody rose abt. saying E inside a metal conductor to be zero.we say that E inside the conductor is 0 for all the charge given to a conductor comes on its surface but this is a spherical shell containing a point charge in it . as the charge on centre is not in contact with conductor, while taking gaussian surface thre will be charge enclosed.

if the sleeve is displaced by x dist
net F=-x(2k+w^2)
therefore time period = 2*3.14(pi)*[square root of(m/2k+w^2)
the system will perform shm for it is being rotated about the vertical axis passing through it,s centre

in what way a macroscopic form of energy be converted into microscopic one