1) An RC circuit contains a 6 uG capacitor and a 2 ohm resistor. Assuming the capacitor is fully charged and discharge begins at
t = 0, at what time is the potential across the capacitor reduced by a factor of one half?
2) A proton is moving through a magnetic field of strength 2 kT with a speed of 2.5*10^8 m/s. If the magnitude of the force of the proton experiences is 33.8 nN, what is the angle between the proton's velocity and the direction of the field?