A standard Canadian football field is 100 m long and 60 m wide. A UFO streaks from one end of the field to the other at a speed of 0.6c relative to the players on the field. An observer in the UFO measures the length of the field to be

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

d. air pressure decreases as altitude increases.

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