Asmall ball of known mass m, with a small charge +q of known magnitude, is provided. the ball is attached to an insulating string. the additional laboratory equipment available includes only those items listed below, plus stands and clamps as needed.
choose the equipment you would use to make measurements needed to determine the magnitude and direction of the electric field between the two plates:

wooden meterstick, protractor, screen, spring scale, stopwatch, bright light, metal rod, camera (still or video), binoculars.

answer: he got 23

explanation:

1 the 4 is sig

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