Amass weighing 64 lb is attached to a spring hanging from the ceiling and comes to rest at its equilibrium position. at time tequals0, an external force of upper f (t )equals3 cosine 5 t lb is applied to the system. if the spring constant is 10 lb/ft and the damping constant is 2 lb-sec/ft, find the steady-state solution for the system. use g equals 32 ft divided by sec squared.

a=d/t

a="triangle"v/t

explanation:

a = acceleration

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