Write the reasons for the following observations. (a) Naphthalene disappears with time without leaving any solid. (b) The smell of perfume reaches us even after sitting far away.

Convert the following temperatures into Kelvin Unit. (a) 25°C (b) 373°C

What type of Clothes should be wear in summer ?

Why are we able to slip. Hot tea or milk faster from a saucer rather than a Cup?

Why does our palm ful cold when we put some aceton or petrol or perfume on it ?

How does the water kept in an earthen pot(matka) become cool during summer.