Have students tell you when it is hot. Remove the penny from the burner, turn out the lights, and have the students count out loud until the penny is no longer glowing. Reheat the penny until it glows ...

The convection of air around the penny may also contribute to this effect. Pour 5mm of acetone in a 250mL beaker. Grasp the nichrome wire 8" - 10" above the penny and hold the penny in the flame of a ...

Pour 5mm of acetone in a 250mL beaker. Grasp the nichrome wire 8" - 10" above the penny and hold the penny in the flame of a Bunsen burner or torch flame until it is red hot. Position the wire so that ...