An air bubble of volume 2 cm(^3) is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10m of water?
-
A.
6cm3 -
B.
4cm3 -
C.
3cm3 -
D.
2cm3 -
E.
1cm3
Correct Answer: Option A
Explanation
P(_1)V(_1) = P(_2)V(_2)
When the bubble comes to the surface and pressure drops 3 times, the volume increases 3 times.
V(_2) = 3 x 2
= 6 cm(^3)