First slide

Surface tension and surface energy

Question

The work done in blowing a soap bubble of 10 cm radius is (Surface tension of the soap solution is $\frac{3}{100} N / m$ )

Moderate

A

$75 .36 \times 10^{- 4} joule$
B

$37 .68 \times 10^{- 4} joule$
C

$150 .72 \times 10^{- 4} joule$
D

$75 .36 joule$

Solution

$\begin{array}{l} W = 8 {πR}^{2} T = 8 \times 3 .14 \times (10 \times 10^{- 2}) \times \frac{3}{100} \\ = 7 .536 \times 10^{- 3} J \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App