The motion of a projectile is described in a coordinate system (up and North are positive). At a particular instant, the magnitude of the horizontal
component of the velocity is 5 m/s and the magnitude of the vertical
component of the velocity is - 8 m/s. Which is most correct about the
object?
The projectile is at its maximum height
O the projectile is ascending (going up)
the projectile is descending (going down)
the projectile has hit the ground
the projectile has just been launched above the horizontally

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