Question
Physics Question on Ideal gas equation
An air bubble having volume 1 cm3 at depth 40 m inside water comes to the surface. What will be the volume of the bubble at the surface?
A
5 cm3
B
2 cm3
C
4 cm3
D
3 cm3
Answer
5 cm3
Explanation
Solution
The correct option is (A): 5 cm3
Initial pressure = P0 + ρgh
= 105 + 1000 × 10 × 40
= 5 × 105
Final pressure = 105
PV = constant
⇒ 5 × 105 × Vi = 105 × Vf
⇒ Vf = 5 cm3