Physics equation question??

Question

thermal conductivity is defined as:
k = [(Q/t)x] / AT where:
(Q/t) = rate of heat flow
x = thickness of material
A = cross sectional area of medium
T = temperature difference

Show that this is analogous to the definition of elecrical restivity p = (RA)/L = V/I A/L

Answer 1

Some of the analogies are exact, for example you have the area A in both, and thickness x and L are the same thing. The temperature difference corresponds to voltage and the thermal conductivity is analogous to the reciprocal of resistivity, and the rate of heat flow corresponds to the rate of current flow, I. Make all those identifications and you're done.

Answer 2

[Thermal conductivity or electrical conductivity] is given by the same formula

k = [(Q/t) x] / AT

Where

(Q/t) = rate of [heat or charge] flow
x = thickness of material
A = cross sectional area of medium
T = (temperature or potential difference)


[Thermal conductivity or electrical conductivity is the reciprocal of thermal resistivity or electrical resistivity.