When an air bubble rise from the bottom of a deep lake to a point just below the water surface, the pressure of air inside the bubble

Options

A. is greater than the pressure outside it
B. is less than the pressure outside it
C. increases as the bubble moves up
D. decreases as the bubble moves up

Answer

A, D

Explanation

Pressure excess inside are bubble `=(2T)/(R )`
`P_("in")=P_("out")+(2T)/(R )` implies as air bubble rises `(P_("out")=P_("atm")+hrhog)`
decreases, so option (A,D) are correct.