Which force requires contact? A. The force produced by interactions between magnetic objects O B. The force produced by interactions between electrically charged objects C. The force exerted by air as an object moves through it D. The force of attraction between two masses

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