WAEC - Physics (1995 - No. 15)
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?
6cm3
4cm3
3cm3
2cm3
1cm3
Explicació
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\(^3\)