Find the pressure in the air column at which the piston remains in equilibrium. Assume the piston to be massless and frictionless.

Find the pressure in the air column at which the piston remains in equ

1.	Find the pressure in the air column at which the piston remains in equilibrium. Assume the piston to be massless and frictionless.
Answer» Solution :LET `P_(a)`, be the air pressure above the PISTON. Applying Pascal.s law at point A and B. `p_(atm)+rho_(w)(5)=P_(a)rho_(k)G(1.73)(SQRT(3))/(2),P_(a=138 kPa`