009 (part 1 of 4) 10.0 points A high-speed sander has a disk of radius
6.01 cm that rotates about its axis at a con-
stant rate of 806 rev/min.
Determine the angular speed of the disk.
Answer in units of rad/s.
010 (part 2 of 4) 10.0 points
Determine the linear speed of a point 1.25 cm
from the disk's center.
Answer in units of m/s.
011 (part 3 of 4) 10.0 points
Determine the centripetal acceleration of a
point on the rim,
Answer in units of m/s?.
012 (part 4 of 4) 10.0 points
Determine the total distance traveled by a
point on the rim in 1.81 s.
Answer in units of m.

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