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प्रश्न
Define the term calorie. How is it related to joule (the S.I. unit of heat)?
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उत्तर
One calorie of heat is the heat energy required to raise the temperature of 1 g of water from 14.5°C to 15.5°C.
1 calorie = 4.186 J
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संबंधित प्रश्न
Name the three modes of transfer of heat.
Name the mode of transfer of heat in the following :
(a) solid,
(b) liquid,
(c) gas
(d) vacuum
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What will absorb heat?
Water
Give a scientific reason.
In winter, why does an iron pillar feel colder than a wooden pole?
The unit of heat and temperature are the same.
The process of converting a liquid into a solid is called ________.
When an electric current is passing through the conductor ______ energy is produced.
A circular metal loop is heated at point O as shown in the following figure.
- In which direction would heat flow in the loop?
- In which order are the pins at points P, Q and R fixed with the help of wax fall if points O, P, Q and R are equidistant from each other?
