Properties Of Solids And Liquids Question 348

Question: The work done in blowing a soap bubble of 10 cm radius is (Surface tension of the soap solution is $ \frac{3}{100}N/m $ )[MP PMT 1995; MH CET 2002]

Options:

A) $ 75.36\times {{10}^{-4}}joule $

B) $ 37.68\times {{10}^{-4}}joule $

C) $ 150.72\times {{10}^{-4}}joule $

D)$ 75.36joule $

Show Answer

Answer:

Correct Answer: A

Solution:

$ W=8\pi R^{2}T=8\times 3.14\times (10\times {{10}^{-2}})\times \frac{3}{100} $

$ =7.536\times {{10}^{-3}}J $



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