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प्रश्न
How fog is formed?
उत्तर
When water vapour condenses around microscopic solid particles such as dust, fog is formed.
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संबंधित प्रश्न
The specific latent heat of fusion of water is ______.
Explain the following temperature vs time graph.
Answer the following:
Explain the role of latent heat in the change of state of a substance.
When a liquid is getting converted into solid, the latent heat is ………………………………
Water expands on reducing its temperature below ______°C.
What is the name given to the energy absorbed during a phase change?
Explain why water is used in hot water bottles for fomentation and also as a universal coolant.
State the main precautions to be taken in finding the latent heat of steam.
If pressure increases, the melting point of a substance ______.
During reheating, ice is converted to water at a temperature of 0 °C.
1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour.
Write scientific reason.
Even if boiling water is constantly heated, its temperature does not rise.
Write scientific reason.
The bottom of some steel utensils used for cooking is copper.
Give some practical applications of specific latent heat of ice.
Calculate the total amount of heat energy required to melt 200 g of ice at 0°C to water at 100°C. (Specific latent heat of ice = 336 Jg-1, specific heat capacity of water = 4.2 Jg-1 °C-1)
The diagram below shows a cooling curve for a substance:
- State the temperatures at which the substance condenses.
- The temperature range in which the substance is in liquid state.
- Why do we prefer ice to ice-cold water for cooling a drink?
