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प्रश्न
______ of heat does not require a medium.
विकल्प
radiation
white
conduction
blue
convection
bad conductor
good conductor
black
reflection
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उत्तर
Convection of heat does not require a medium.
Explanation:
In convection, when the temperature of a substance increases due to heat, its molecules move faster, causing them to rise. As a result, cooler and denser objects sink to the bottom. This process is possible only when a substance (liquid or gas) is present, as it requires the mobility and movement of molecules.
संबंधित प्रश्न
No medium is required for transfer of heat by the process of ______.
Fill in the blank
Heat transfer in solids is by ______
State the direction of heat transfer by way of convection.
Explain briefly the process of heat transfer by radiation.
How does a fever get lowered by putting a cold compress on the forehead of a patient?
Why is the outer coat of the penguins of Antarctica black?
Why are heaters fitted near the floor and air conditioners near the ceiling of a room?
Heat is the transfer of energy between two objects at different temperatures.
When ice changes into a liquid, it absorbs energy.
Take a sheet of paper. Draw a spiral on it as shown in Figure. Cut out the paper along the line. Suspend the paper as shown in Figure above a lighted candle. Observe what happens. Think of an explanation.
