Which is a statement of the law of conservation of mass? The total mass before a chemical reaction is the same as the total mass after the reaction. O Mass can be created or destroyed in a reaction. The total amount of mass is equal to the volume of both chemicals in the reaction. Every reaction creates an equal amount of mass related to the amount of energy required for the reaction.

Every reaction creates an equal amount of mass related to the amount of

energy required for the reaction.

b. The total mass before a chemical reaction is the same as the total mass after

the reaction.

c. Matter can not be conserved.

d. The total amount of mass is equal to the volume of both chemicals in the

reaction.

volume: 22

density: 7.04

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