From the inclined plane of the figure take the whole system m1 and m2, make the free-body diagram and try to reach the expression of acceleration of the bodies. with m1 = 2m2 a = g (sinθ-1) / 3

Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle  can be assumed at 30 deg