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A soap film of surface tension `3 xx 10^(-2)N//m` formed in a rectangular frame can support a straw as shown in Fig. If `g = 10 ms^(-2)`, the mass of

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A soap film of surface tension `3 xx 10^(-2)N//m` formed in a rectangular frame can support a straw as shown in Fig. If `g = 10 ms^(-2)`, the mass of the straw is
image
A. `0.66` g
B. 60 g
C. 6 g
D. `0.6` g
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Correct Answer - D
F = T2L
` = 3 xx 10^(-2) xx 2 xx 0.1`
` = 6 xx 10^(-3)` kg
mg = 6 g
` m = (6xx10^(-3))/10 = 0.6` g
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