The lubrication of bone joints is a subject of ongoing medical research. two bones connected at a joint do not touch. the bones are covered in articular cartilage, and are surrounded by lubricating synovial fluid. rheumatoid arthritis results in overproduction of synovial fluid, swollen joints, and difficult and painful movement. other joint disorders degrade the synovial fluid, directly increasing the friction between the bones, resulting in painful motion.

part a

to measure the effective coefficient of friction in a bone joint, a healthy joint (and its immediate surroundings) can be removed from a fresh cadaver. the joint is inverted, and a weight is used to apply a downward force

b.

explanation:

10.0

answer: (431,2)

step-by-step 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

i believe the answer is electric potential.

explanation: