Final answer:
Fourier's Law of thermal conductivity describes the rate of conductive heat transfer through a material slab based on temperature difference, surface area, thickness, and thermal conductivity.
Step-by-step explanation:
Fourier's Law of thermal conductivity describes the rate of conductive heat transfer through a slab of material. It states that the heat transfer rate (Q/t) is proportional to the temperature difference across the slab (T₂ - T₁), the surface area (A), and the thickness (d) of the material. The equation is given by:
Q/t = kA(T₂ - T₁)/d
where k is the thermal conductivity of the material. This law assumes that the thermal conductivity does not change with temperature.