A proton is released from rest at the left side of a region with a uniform electric field that is directed to the right. At the same time, an electron is released from rest on the right side of this same region. Ignoring any gravitational forces as well as the electrical forces of either charge on the other, how far does the proton move before the electron and proton pass each other

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over