Krishna
0

Surface tension of  a liquid is measured as force acting per length

Surface tension T = \frac{force(F)}{area(A)}.....................(1)

You can calculate force  F = T * A

Step 1: In the question they given

1 cm = 10^{-2}

Surface tension of mercury = 460 * 10^{-3}

We have to calculate the energy

FORMULA: Force F = T * $4 \pi r^2 [n^(\frac{1}{3}) -1)]$

Step 2: Substitute the known values in the formula

Force F = $460 * 10^{-3} * 4 \pi (10^{-2})^2 [(10^6)^(\frac{1}{3}) -1)]$

F = $460 * 12..56 * 10^{-3} * 10^{-4} * [100 -1]$

F = 46 * 10 *12.56 * 10^{-7} (99)

F = 57,198.24 * 10^{-6}

F = 0.057 joule

Vamsi Krishna
0
Thanks