Fluid Mechanics Viscosity Question 244
Question: Two soap bubbles of radii$ r_{1} $ and $ r_{2} $ equal to 4 cm and 5 cm are touching each other over a common surface $ S_{1}S_{2} $ (shown in figure). Its radius will be[MP PMT 2002]
Options:
A) 4 cm
B) 20 cm
C) 5 cm
D) 4.5 cm
Show Answer
Answer:
Correct Answer: B
Solution:
$ r=\frac{r_{1}r_{2}}{r_{1}-r_{2}}=\frac{5\times 4}{5-4}=20\ cm $
BETA
