The driver of a 770 kg car decides to double the speed from 23.1 m/s to 46.2 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car? Give your answers to the following questions in joules.

The final kinetic energy is four times of initial kinetic energy when speed of the car doubles.

= 4

Explanation:

Mass of the car = 770 kg

initial speed = 23.1

Final speed = 46.2

Initial kinetic energy =

⇒ = 0.5 × 770 ×

⇒ = 205440 J

Final kinetic energy   =

⇒ = 0.5× 770 ×

⇒ = 821760 J

Thus = 4

Therefore the final kinetic energy is four times of initial kinetic energy when speed of the car doubles.

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right

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