Remove the wood block from the water. Place the brick block into the water and let it sink. How much water does the brick block displace? Hint: This is the liquid level with the block minus the liquid level before the block is added.

the volume desalinated  that is placed is equal to the volume of the block.

Explanation:

For this exercise we use the Archimedean principle which states that the thrust is equal to the weight of the desalted liquid.

                      B = ρ g V

When we have the block of wood the volume of water desalinated in the volume of the block under water, this is because the wood floats in the water

When placing the block of clay (brick), it sinks, so the volume desalinated  that is placed is equal to the volume of the block.

          V_body = V_waer = l to h

the answer is b

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