Properties of matterMedium
Question
The work done in blowing a soap of radius 0.2m given that the surface tension of soap solution is 60 × 10-3 N/M is
Options
A.24π × 10-4J
B.24π × 10-4J
C.96π × 10-4J
D.1.92π × 10-4J
Solution
W = TᐃA = T × 2 [4πR2]
60 × 10-3 × 8π × (0.2)2
1.92π × 10-4 J
60 × 10-3 × 8π × (0.2)2
1.92π × 10-4 J
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