The magnitude of the magnetic field in a magnetic resonance imaging (mri) machine can be as great as b = 2.0 t . under normal circumstances, this field cannot be shut off by just flipping a switch. instead the magnitude needs to be carefully decreased to zero. in an emergency, however, the magnet can be "quenched" so that b reduces to zero in 20 s. such a quench can cost thousands of dollars and likely damages the magnets. assume that the magnetic field exists inside a cylinder of radius r = 300 mm and length ℓ = 200 mm . part a how much magnetic potential energy is dissipated when the magnetic field is quenched in this way?

chemical properties of thing

gas and liquid

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.

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