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'To show heat flow from a body at a higher temperature to one at a lower temperature.'
Please tell me the observation and I am asking last time please tell

Dear Student,
There are plenty of observations in our day to day life where heat transfers from a hot body to cold body. For example:
1. Melting of ice when put at room temperature. Heat from the surroundings transfer to the ice, thereby increasing its temperature and causing it to melt.
2. Heating water using immersion rod. The heat of the immersion rod is transferred to the water molecules resulting in increase of the temperature of the water.
3. Melting of ice cream.
and many more

Regards

 

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if we talk about the observations, then we can take example of the sea breeze. you must have observed, that when you go on a beach ride or tour in the night time, the land is cool but sea is hot. in this case we can take it as 'heat flow at a higher temperature to a lower temperature'. the hot air comes from sea and gets collected in the land. hope this helps you :) 
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