JEE Main 20203 Sep, Morning shiftPhysicsMediumProperties of Solids and Liquids184× since 2002
When a long glass capillary tube of radius
0.015 cm is dipped in a liquid, the liquid rises
to a height of 15 cm within it. If the contact angle
between the liquid and glass to close to 0^o, the
surface tension of the liquid, in milliNewton m–1,
is [_(liquid) = 900 kgm^–3, g = 10 ms^–2]
(Give answer
in closest integer) _____.