Properties Of Matter

A liquid column of height \(0.04 \mathrm{~cm}\) balances excess pressure of a soap bubble of certain radius. If density of liquid is \(8 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}\) and surface tension of soap solution is \(0.28 \mathrm{~Nm}^{-1}\), then diameter of the soap bubble is __________ \(\mathrm{cm}\). (if \(\mathrm{g}=10 \mathrm{~m} \mathrm{~s}^{-2}\) )