Aresistor has a current of 2 amperes when connected to a single battery. if a second identical battery is connected in series with the first, what is the current through the resistor? a) still 2 amps b) 4 amps c)1 amp d) no current

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