Vibrating pennies – conduction experiment
Vibrating pennies Take a bottle with a narrow opening. The opening should be just about the size of a penny. Dip a penny in a bowl of ice water. Hold the neck of the bottle in the ice water for a few seconds too. Place the penny over the mouth of the jar. Place some oil around the bottles opening or on the penny in order to provide a completely air tight seal. Now hold bottle in your hands and carefully observe the penny. It should begin bouncing around. Rubbing the bottle will increase the heat even more. Remember - heat causes things to expand (or get larger). Cold causes things to contract (or get smaller). The heat from your hands is transferred through conduction to the