PDF chapter test TRY NOW
- Take two paper bags or empty paper cups of the same size.
- Hang the two bags in the inverted position on the two ends of a metal or wooden stick.
- Tie a piece of thread in the middle of the stick.
- Hold the stick by the thread as in a balance.
- Put a burning candle below one of the bags as shown in the figure.
- Observe what happens.
Experimental set-up
Why is the balance of the bags disturbed?
The paper bag is pushed upwards because the warm air being and fills the space inside the bag. Therefore, one side of the stick becomes and thus, the balance is disturbed. From this experiment, it is evident that .
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