Miya Balishtiye was confused when he saw the woodcutter blowing on his cold hands to make them warm and on the hot potatoes to cool them.

Have you warmed your hands in winter by blowing on them when they are cold? How does it feel?

Blow hard from your mouth onto your hands. How did you find the air from your mouth as compared to the air around? Was it hotter, or cooler?

Now put your hands at some distance from your mouth, and blow again. Does the air from your mouth feel warm? Why?

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Solution

Disclaimer: This section comprises questions that has to be answered by a student based upon his own imagination. Considering this, the answer to the same has not been provided.

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Similar questions

Sonu was feeling very cold. He kept blowing on to his hands. Now think and write, which will be cooler – Sonu’s hands or his breath?

Measure your chest

– Take a deep breath in

– Ask your friend to measure your chest with a thread.

Measurement____________

– Now breathe out. Again ask your friend to measure your chest. Measurement____________

– Was there any difference in the two measurements of your chest?

Why do your hands get warm when you rub them together?

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