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State two characteristics of a good thermion emitter.
State any two measures to minimize the impact of global warming.
What do you understand by the term latent heat?
1 g ice of 0℃ melts to form 1 g water at 0℃. State whether the latent heat is absorbed or given out by ice.
Which has more heat: 1 g ice at 0℃ or 1g water 0℃? Give reason.
The specific latent heat of fusion of water is ______.
During transformation of liquid phase to solid phase, the latent heat is ______.
Explain the following temperature vs time graph.
Give one consequence of the high specific latent heat of fusion of ice.
Why do we feel much comfortable when we sit under a moving fan especially when our body is sweating?
State two advantages of the high specific latent heat capacity of steam, which is about 226 × 104 J/kg?
Derive an expression for the amount of heat given out or taken up, when its temperature falls or rises by t°C.
If pressure increases, the melting point of a substance ______.
Write scientific reason.
Even if boiling water is constantly heated, its temperature does not rise.
Give some practical applications of specific latent heat of ice.
2875 J of heat is required to melt 115 g of lead at its melting point. Calculate the specific latent heat capacity of fusion of lead.
