A) \[35\,N/{{m}^{-2}}\]
B) \[70\,N/{{m}^{2}}\]
C) \[140\,\,N/{{m}^{2}}\]
D) Zero
Correct Answer: C
Solution :
\[\Delta P=\frac{2T}{R}=\frac{2\times 70\times {{10}^{-3}}}{1\times {{10}^{-3}}}=140\,N/{{m}^{2}}\]
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