Properties Of Solids And Liquids Question 315
Question: A soap bubble in vacuum has a radius of 3 cm and another soap bubble in vacuum has a radius of 4 cm. If the two bubbles coalesce under isothermal condition, then the radius of the new bubble is[MP PMT/PET 1998; JIPMER 2000]
Options:
A) 2.3 cm
B)4.5 cm
C) 5 cm
D)7 cm
Show Answer
Answer:
Correct Answer: C
Solution:
$ r=\sqrt{r _{1}^{2}+r _{2}^{2}}=\sqrt{9+16}=5\ cm $
