metal rod experiment

Aim: To observe conduction along a metal rod.
Equipment: A metal rod, retort stand and clamp, bunsen burner, petroleum jelly,-510 drawing, a stopwatch.
Method:

1. Set up and light the bunsen burner.
2. Smear a small amount of petroleum jelly on to the head of each drawing pin.
3. Attach the drawing pins at even intervals along the length of the metal rod.
4. Clamp one end of the metal rod to a retort stand.
5. Position the retort stand so the unclamped end of the metal rod is in the Bunsen flame and start the stopwatch.
6. Record the time it takes for each pin to drop on the table below.

Pin Number  Time to drop

Blue (1)      18 seconds

Gold (2)      44 seconds

Green (3)    1.25 seconds

Silver (4)    2.04 seconds

Black (5)    3.54 seconds

Explanation: The heat particles transfer through the metal rod until the pins start vibrating and full off the rod.