Athermally isolated system consists of a hot piece of aluminum and a cold piece of copper. the aluminum and the copper are in thermal contact. the specific heat of aluminum is more than double that of copper. which object experiences the greater amount of heat transfer during the time it takes the system to reach thermal equilibrium?

a) the aluminum experiences the greater magnitude of heat transfer.
b) the copper experiences the greater magnitude of heat transfer.
c) both experience the same magnitude of heat transfer.

Explanation:

Make up a question.

The only change is going to be c.

Suppose they aluminum starts our higher at 50oC

Suppose the copper starts out at 20oC

Suppose the mass of both are 25 grams.

Aluminum

m*2c * deltat

Copper

m*c*deltat

deltat = x - 20

m = 25

c = c

Now since the amount of heat is the same (this starts out on a heated slab of something).

m*2c * (50 - x) = m * c * x - 20  The m and the c are the same. Cancel them out.

2 * (50 - x) = (x - 20)    Remove the brackets.

100 - 2x = x - 20          Add 20 to both sides.

120 - 2x = x                  Add 2x to both sides.

120 = 3x                       Divide by 3

x = 40

What does this tell you?

It tells you that the temperature of the aluminum is only going to drop 10 degrees

The copper is going to gain 40 - 20 = 20  degrees.

The heat transfer is actually the same. It doesn't take as much heat to heat copper as it does aluminum. That's shown by the difference in how the temperature changes. One looses 10 degrees. The other gains 20. The transfer is the same because of the way the "c" operates.        

found in the nucleus

has mass of one amu

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