An object with a potential energy of 200 joules is dropped from a height of 2.00 meters. what is its kinetic energy when it reaches the ground? a. 50 joules b. 100 joules c. 200 joules d. 400 joules

The answer is C. 200j

Explanation:

The Law of conservation of energy states that energy cannot be created or destroyed, therefore, when the object hits the ground the kinetic energy will be 200J. The gravitational energy has just be transferred into kinetic energy.

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step-by-step explanation:

we are given

we have to simplify it

firstly, we will factor it

now, we can cancel like terms

now, we can combine it

so, we get

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