Three capacitors C1, C2, and C3 are connected in series with one another. The capacitance of C1 is 1µF, the voltage across C2 is 8V and C3 stores a charge of 2µC. Find, the equivalent Capacitance of the combination if the supply Voltage is 20V d. c supply.

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