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प्रश्न
Give scientific reason.
Dew drops form on the grass in winter.
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उत्तर
In winter, the temperature drops at night, due to which the water vapour present in the air cools down and turns into water droplets through the process of condensation. When this cold air comes in contact with the surface of the grass, the water vapour condenses and collects on the grass in the form of dew droplets.
संबंधित प्रश्न
What is heat ? State its S.I. unit.
Name the mode of transfer of heat in the following :
(a) solid,
(b) liquid,
(c) gas
(d) vacuum
What will absorb heat?
Iron griddle (tava)
Give a scientific reason.
In winter, why does an iron pillar feel colder than a wooden pole?
Write scientific reason.
In the cold regions, snow falls in winter.
The unit of heat and temperature are the same.
Which of the following substances will absorb more heat energy?
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
We can absorb heat by rubbing two surfaces of some substances.
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?
