A200.0-g copper cylinder at 500°c is placed on a large block of ice at 0.00°c. assume that no energy is transferred to the surroundings.
what is the mass of the ice that will melt?
the specific heat of copper is 385 j/kg•°c.

0.115 kg

Explanation:

Since no energy is transferred to the surroundings, all the heat from the copper is used to melt the block of ice. So we can write:

where:

is the mass of the copper

Cc = 385 J/kg•°C is the specific heat of copper

is the change in temperature of the copper (the copper stops to give heat to the ice when they are in thermal equilibrium, so when they have reached the same temperature)

is the mass of ice

is the latent heat of fusion of ice

Solving the equation for the mass of the ice, we find

layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .

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