Why are cloudy nights warmer than clear nights?
Important Questions on Flow of Heat
How do the feathers of a bird protect it from the cold?
Deepti went on an expedition to Iceland. Because it is very cold there she took a fur coat with her. On reaching there she realised that it was so cold that even the fur coat was not enough. A local friend told her to wear the fur coat inside out so that the fur side was inside. She tried it and felt much warmer. But she was confused. She knew that fur traps air that provides insulation from the cold but could not understand why inverting the coat made it more effective. Can you solve her confusion?
On a cold night in Shimla, Mohini noticed a stray dog shivering near her house. She immediately brought an old blanket from her home and used it to wrap the dog. Then she fed it with some warm milk. What value did Mohini show?
