A block in the shape of a rectangular solid has a cross-sectional area of 4.50 cm2 across its width, a front-to-rear length of 16.0 cm, and a resistance of 835 O. The block's material contains 3.15 x 1018 conduction electrons/m3. A potential difference of 30.8 V is maintained between its front and rear faces.
what is the mean free time between collisions of the free electrons in the block?
Whats the conductivity of the material?