A spherical soap bubble of radius 3 cm is formed inside another spherical soap bubble of radius 6 cm. If the internal pressure of the smaller bubble of radius 3 cm in the above system is equal to the internal pressure of the another single soap bubble of radius r cm. The value of r is ___________.
Answer (integer)
2
Solution
<p>${{4T} \over {{R_1}}} + {{4T} \over {{R_2}}} = {{4T} \over r}$</p>
<p>$\Rightarrow {1 \over r} = {1 \over 3} + {1 \over 6} \Rightarrow r = 2$ cm</p>
About this question
Subject: Physics · Chapter: Properties of Solids and Liquids · Topic: Elasticity
This question is part of PrepWiser's free JEE Main question bank. 183 more solved questions on Properties of Solids and Liquids are available — start with the harder ones if your accuracy is >70%.