Si and Cu are cooled to a temperature of `300 K`, then resistivity

Si and Cu are cooled from 300 K to a temperative of 60 K. Then resistivity

A piece of copper and another of germanium are cooled from room temperature to 77 K, the resistance of ……….

A piece of copper and another of germanium are cooled from room temperature to 77 K, the resistance of -

A piece of copper and another of germanium are cooled from room temperature to 77 K, the resistance of -

Copper and Germanium are cooled from room temperature to 100K. Then the resistance of