Describe the phases that appear as an iron-0.5 weight percent carbon alloy is slowly cooled from the meltingtemperature. describe the compositions of the phases and weight fractions of each phase at each of thefollowing temperatures: 1470°c, 1100°c, 740°c, and 500°c. at what temperature will the austenitephase in this alloy have the highest carbon content? when the alloy is held at 700 c, what is the weightfraction of the ferrite phase that formed inthe alloy before the eutectoid reaction had taken place?

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