PDF chapter test TRY NOW
- Take an aluminium tube about 15\ cm long and 1 to 1.5\ cm in diameter.
- Cut slice of a medium-sized potato about 2\ cm thick.
- Insert the tube in the slice, press it, and rotate it 2–3 times.
- Remove the tube.
- You will find a piece of potato fixed in the tube like a piston head.
- Repeat the same process with the other end of the tube.
- Now you have the tube with both ends closed by potato pieces with an air column in between.
- Take a pencil with one end unsharpened.
- Place this end at one of the pieces of potato.
- Press it suddenly to push the potato piece in the tube.
Experimental set-up
Important!
CAUTION: When you perform this activity, make sure that nobody is standing in front of the tube.
Observe what happens.
The activity shows rather dramatically how .
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