How does our body maintain its temperature during summer
During summer, we perspire more because of the mechanism of our body which keeps us cool. During evaporation, the particle at the surface of the liquid gain energy from body surface and change into vapour phase. In this process the heat energy equal to latent heat of vaporization is absorbed from the body leaving the body cool.
For any substance, why does the temperature remain constant during the change of state ?
Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
What is the physical state of water at
0°C
What is the physical state of water at
100°C
Give two reasons to justify
Water at room temperature is a liquid.
Give two reasons to justify
An iron almirah is a solid at room temperature.
Mock Test Series
