Which of the following scenarios best describes the concept of Terminal Velocity? a. The velocity of an object in a train terminal or station.

b. The velocity of an object falling but only when air-resistance is neglected.

c. The velocity of an object falling cannot increase because the force of gravity is offset by the force of air-resistance.

d. There is no such thing as terminal velocity – air-resistance could never be as strong as gravity.

unlike poles attract

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