States of Matter - Gas and Liquid
Why does a desert cooler cool better on a hot dry day?
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
Acetone, petrol and perfume are low boiling liquids. When they're poured on palm, they evaporate readily and for this change of state, they take the energy from our palm and we get a cooling sensation.
Why does a desert cooler cool better on a hot dry day?
How does the water kept in an earthen pot (matka) become cool during summer?
What type of clothes should we wear in summer?
Convert the following temperatures to the Celsius scale. $$(a)$$ $$293K$$ $$(b)$$ $$470K$$
Why does evaporation produce cooling?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Explain why in hot summer day water remains cool in earthen pots.
Why water kept in an earthen pot during summers cools on its own?
Which of the following statements are false? Rewrite them correctly. Evaporation is the process by which liquid turns into gas.