Advertisements
Advertisements
Question
How does water kept in an earthen pot (matka) become cool during summer?
Advertisements
Solution
- An earthen pot has some pores through which the liquid inside it evaporates.
- This evaporation cools the water inside the pot, so water kept in an earthen pot becomes cool during the summer.
APPEARS IN
RELATED QUESTIONS
Why does a desert cooler cool better on a hot dry day?
Why are we able to sip hot tea or milk faster from a saucer than a cup?
Evaporation takes place from the
A patient suffering from high fever is advised to put wet clot strips on his forehead. Why?
What is evaporation ? State the various factors which affect evaporation.
Why does evaporation cool a liquid ?
The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The state B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous physicist.
- Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E
- Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as ?
- Name one substance which normally belongs to state B but whose solid form changes directly into gaseous state.
- Name the most common substance belonging to state A.
- Which state of matter makes the sun and other stars to glow ?
How does the water kept in an earthen pot remain cool?
Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.

The process of evaporation is not a good technic to separate salt from seawater give a reason.
