Studying for final, this is one of the suggested questions, I have no idea how to approach it. 1. The problem statement, all variables and given/known data A cylindrical aluminum rod of 2 mm in diameter and 5 cm in length has a thermal conductivity of 237 W m-1 K-1 at 300 K. Calculate the electron mobility in the rod if aluminum has 3 valence electrons per atom, density of 2.7 g cm-3 and atomic mass of 26.98. 2. Relevant equations The way i see it is i need to calculate conductance and then drift mobility n=3d*Na/Ma c = e*n*Md trying to find Md 3. The attempt at a solution I can find the number of electrons/cm^-3 but i have no idea where to go from there. How is electrical conductivity dependent on thermal conductivity??