The diagram depicts four rods. Each one is constructed from a different metal. Wax is used to fix small metal balls to the rod ends P, Q, R and S. All the rods have the same dimensions. They are heated evenly by a Bunsen burner at point X. As the rods heat up, the wax melts and the balls drop off. Why does the ball on the silver rod drop off first?
- ASilver is the best conductor of heat.
- BSilver is the worst conductor of heat.
- CSilver is the best radiator of heat.
- DSilver is the worst radiator of heat.