Question

Calculate the difference $\left(h\right)$ in water level in two communicating capillary tubes of radius $1mm$ and $1.5mm$. Surface tension of water $=0.07N{m}^{-1}$.

Answer 1

density of water $1000kg/m^3$

Formula,

$2\sigma (\frac{1}{R_1}-\frac{1}{R_2})=hdg$

$2\times 0.07(\frac{1}{1}-\frac{1}{1.5})=h\times 1000\times 9.8$

upon solving the above equation, we get,

$\therefore h=0.047m$