Newton's first law of motion states that an object in motion tends to stay in motion unless it
a
starts to decelerate.
b
runs out of kinetic energy.
с
is acted upon by another force.
d
approaches the speed of light

Your answer is C.

Explanation:

An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

C. Is acted upon by another force

Explanation:

Newton's First Law of Motion states that an object in motion tends to stay in motion unless is acted upon by another force. If, for example, I roll a marble, it tends to stay in motion, until friction (a force) acts on it. Therefore, a force must act on an object that is in motion in order to stop it.

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation:

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