Properties Of Solids And Liquids Question 344

Question: Surface tension of a soap solution is 1.9×10−2N/m. . Work done in blowing a bubble of 2.0 cm diameter will be [MP PMT 1991]

Options:

A) 7.6×10−6π joule

B) 15.2×10−6π joule

C) 1.9×10−6π joule

D) 1×10−4π joule

Show Answer

Answer:

Correct Answer: B

Solution:

W=8πR2T=8π×(1×10−2)2×1.9×10−2 =15.2×10−6πJ

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