A circuit has two batteries and a resistor as shown. In the figure, the terminal voltage of the 12 V battery is closest to . a. 15.6 V
b. 13.2 V
c. 8.4 V
d. 10.8 V
e. 9.6 V

An electron and a proton are held on an x axis, with the electron at x = + 1.000 m and the proton at x = - 1.000 m. part a how much work is required to bring an additional electron from infinity to the origin? express your answer with the appropriate units. part b if, instead of the second electron coming in from infinity, it is initially at x = + 20.00 m on the axis and is given an initial velocity of 100.0 m/s toward the origin, does it reach the origin? part c how close to the origin does it come?