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Q.1 Q.2 Q.3 Birds swell their feathers i...

Q.1 Q.2 Q.3 Birds swell their feathers in winter. Why? If a drop of water falls on a hot plate, it takes long time to evaporate. Why?.. Even when no heat is exchanged by the contents of a thermos flask, the contents get heated up by constant shaking. Why? A faulty thermometer has its fixed points marked as 5°C and 95°C. Temperature of a body as measured by It is 59°C. Find the correct temperature of the body in °C. 2 kg water at 80°C is mixed with 3 kg water at 20°C. Assuming no heat losses, find the final temperature of the mixture. Q.4 Q.5

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