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प्रश्न
The earth receives heat from the sun by ______.
विकल्प
radiation
white
conduction
blue
convection
bad conductor
good conductor
black
reflection
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उत्तर
The earth receives heat from the sun by radiation.
Explanation:
Radiation is the transfer of energy through electromagnetic waves, such as light and infrared radiation. These waves travel through the vacuum of space, without the need for a medium, and reach the Earth, where they are absorbed, warming the planet.
संबंधित प्रश्न
Give two examples each of conductors and insulators of heat.
A wooden spoon is dipped in a cup of ice cream. Its other end ______.
Fill in the blank
A hot metallic piece is placed in tap water contained in a bucket. Heat will flow from _______ to _________
Fill in the blank
Heat transfer in liquids and gases is by ________.
Select the correct alternative
In the process of convection, heat travel
State the direction of heat transfer by way of convection.
Maximum heat is absorbed by a ______ coloured object.
How does a fever get lowered by putting a cold compress on the forehead of a patient?
Match the items in column-I to the items in column-II
| Column-I | Column-II | ||
| 1. | Linear expansion | (a) | change in volume |
| 2. | Superficial expansion | (b) | hot body to cold body |
| 3. | Cubical expansion | (c) | 1.381 X 10-23 JK-1 |
| 4. | Cubical expansion | (d) | change in length |
| 5. | Boltzmann constant | (e) | change in area |
The handles of cooking utensils are made of ______.
