A) \[1.5\times {{10}^{-2}}N/m\]
B) \[3.0\times {{10}^{-2}}~N/m\]
C) \[~6.0{{\times }^{-2}}N/m\]
D) \[11\times {{10}^{-2}}~N/m\]
Correct Answer: B
Solution :
A soap bubble, has two free surfaces \[\therefore \]\[W=T\Delta A\] \[\Rightarrow \]\[T=\frac{W}{\Delta A}=\frac{3\times {{10}^{-4}}}{2\times (10\times 11-10\times 6)\times {{10}^{-4}}}\] \[\Rightarrow \]\[T=3\times {{10}^{-2}}N/m\]
You need to login to perform this action.
You will be redirected in
3 sec
