Question

A wire ring of diameter 20cm is gently
lowered on a liquid surface so that its
plane is parallel to the surface and then
pulled up. The extra force applied is
0.084N. The surface tension of the
liquid is
(A) 0.066Nm-1
(B) 0.66Nm-1
(C) 6.6Nm-1
(D) 66Nm-1​

Answer 1

Explanation:

• fyffuguchdjfjfufufufify