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Melting wax:
1. Take a small candle and measure its length with a scale.
2. Now, fix it at a suitable place and light it as shown in figure (a).
Lighted candle
3. Let it burn for some time.
4. Now blow out the candle and measure its length again as shown in figure (b).
Extinguished candle
Can the change in the length of the candle be reversed?
, the change in the length of the candle .
If we were to take some wax in a pan and heat it, can this change be reversed?
, the change .
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