A tube is placed vertically in a beaker of oil $($sp$.$ gr$.=0\mathrm{.}85.$ The interfacial tension between air and oil is $28$ dynes$/$cm and the contact angle is $150$ degree. Calculate:

Is this system water wet? Why?

Capillary rise of oil in the tube if the tube radius is $0\mathrm{.}01$ centimeters

Capillary pressure in $$

$J-$function if permeability is $18md$ and porosity is $0\mathrm{.}27$

What is the capillary pressure if permeability is $8md$ and porosity is $0\mathrm{.}2$