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प्रश्न
What is evaporation? Why does it cause cooling?
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उत्तर
Evaporation is the phenomenon of a change of a liquid into vapour without raising the temperature. Evaporation needs energy for phase change from liquid to gases. As water evaporates off your skin, it absorbs energy(heat) from the body to make the phase change to gas thus cooling the body.
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संबंधित प्रश्न
What is the Fahrenheit scale of temperature ?
Define one joule of heat.
Is it possible to heat a liquid or gas from above? Explain your answer.
Explain the following:
Water is heated generally from below.
Explain the following:
Land becomes warmer than water during the day.
Convert the following temperature into Fahrenheit scale:
1000C
Convert the following temperature into Celsius scale:
32oF
SI unit of temperature is ______.
What is the concept of temperature?
