1. A proton initially moves left to right along the x-axis at a speed of 2.0 x 10^5 m/s. it moves into an electric field that points in the negative x-direction, and travels a distance of 0.20m before coming to rest. Assuming the electric field is constant in this region of space, calculate the electrical potential difference (in V) over this distance.
a. -120
b. 210
c. 360
d. 470
2. Two resistors of values 6.0 ohm and 12.0 ohm are connected in parallel. This combination is hooked in series with a 2.0 ohm resistor and a 24.0V battery. What is the voltage (in V) across the 2.0 ohm resistor?
a. 6.4
b. 8.0
c. 9.6
d. 12.0
e. 14.4