The Dropping Pins Experiment
Aim: To observe conduction along a metal rod
Equipment: A metal rod, retort stand and clam, Bunsen burner, petroleum jelly, 5-10 drawing pins, a stop watch
Method:
- Set up and light a Bunsen burner.
- Smear a small amount of petroleum jelly on to the head of each drawing pin.
- Attach the drawing pins at even intervals along the length of the metal rod.
- Clamp one end of the metal rod to a retort stand.
- Position the retort stand so the unclamped end of the metal rod is in the Bunsen flame and start the stop watch .
- Record the time it takes for each pin to drop in the table below.
1 1 m 13 sec
2 4 m 24 sec
3 6 m 25 sec
4 8 m 24 sec
5 10 m 31 sec
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