Mercury has an angle of contact equal to `140^@` with soda lime glass. A narrow tube of radius 1.00 mm made of this glass is dipped in a trough containing mercury. By what amount does the mercury dip down in the tube relative to the liquid surface outside ? Surface tension of mercury at the temperature of the experiment is 0.465 `N m^-1`. Density of mercury = `13.6xx 10^3 kg m^-3`.

Options

A. 322
B. 285
C. 165
D. 210

Answer

c

Explanation

(c) `h_("Galium")=(74xx13.6)/(6.095)=165.1`