A) \[192\pi \times {{10}^{-4}}J\]
B) \[96\pi \times {{10}^{-4}}J\]
C) \[194.2\pi \times {{10}^{-4}}J\]
D) None of these
Correct Answer: A
Solution :
[a] Work done = increase in surface area \[\times \] surface tension \[=2\times 4\pi \times {{(.2)}^{2}}\times 0.6\] \[=8\pi \times 4\times {{10}^{-2}}\times 6\times {{10}^{-2}}J\] \[=192\pi \times {{10}^{-4}}J\] [Soap bubble has two surfaces]
You need to login to perform this action.
You will be redirected in
3 sec
