***Show all forces, motion/free-body diagrams, calculations, equations, and work. ****

In the gure battery 1 has emf '5 1 = 33.0 V and internal resistance r1 = 0.042 Q and battery 2 has emf '32 = 33.0 V and internal resistance r2 = 0.027 O. The batteries are connected in series with an external resistance R. (a) What R value makes the terminal-to- terminal potential difference of one of the batteries zero? (b) Which battery is that