### Experiment 2 Students conducted an experiment to compare the thermal conductivity of three different metals: Copper, Aluminum, and Iron. Three rods of identical length (30 cm) and diameter (1 cm) were used. One end of each rod was placed in a steady Bunsen burner flame. Small beads of wax were placed at 5 cm intervals along each rod. The students recorded the time (in seconds) it took for the wax bead located 20 cm from the heat source to melt.
| Metal Type | Time to Melt at 20 cm (s) |
|---|---|
| Copper | 45 |
| Aluminum | 82 |
| Iron | 210 |