Your friend says that the ke of an object depends on the reference frame of the observer. explain why you agree or disagree.

Explanation:

The energy possesed by virtue of motion of the body is called its kinetic energy. The formula for the kinetic energy is given by

K.E. = 1/2 mv²

Here, m is the mass of the body and v be the velocity of the body.

As the velocity of the body depends on the frame of reference so the kinetic energy also depends on the frame of reference.

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