Question

A liquid rises to a height of $50cm$ in a capillary tube of diameter $0.04mm$. If density of liquid is $0.08\times {10}^{3}kg$ $m^{-3}$ angle of contact is ${20}^o$, the surface tension of the liquid is ($\cos {20}^o=0.94)$

• A. $4.17\frac{N}{m}$
• B. $0.417\frac{N}{m}$
• C. $4.17\times {10}^{-2}\frac{N}{m}$
• D. $4.25\times {10}^{-3}\frac{N}{m}$

Answer 1

The correct option is D $4.25\times {10}^{-3}\frac{N}{m}$