. If your signal is mixed with high frequency (above 50 kHz) noise and your sampling frequency is limited to what you calculated in (a), what process you propose to be performed on the noise signal before sampling to assure that the discretized signal can be converted back to the original analog waveform

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.