A) 0.06 g
B) 0.6 g
C) 6 g
D) 60 g
Correct Answer: B
Solution :
The weight of straw will be balanced by the force of surface tension \[\therefore \,\,\,\,\,mg\,\,=\,\,2Tl\,\,\Rightarrow \,\,m=\frac{2Tl}{g}\] \[=\,\,\,\,\frac{2\times 3\times {{10}^{-2}}\times 10\times {{10}^{-2}}}{9.8}\,kg\,\,=\,\,0.6\,g\]You need to login to perform this action.
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