Advertisements
Advertisements
Question
Wet clothes dry more quickly on a warm dry day than on a cold humid day. Explain.
Advertisements
Solution
Rate of evaporation is directly proportional to temperature. Thus, the rate of evaporation is higher on a warm day i.e. hot day than cold day having low temperature and clothes dry soon on a warm day.
APPEARS IN
RELATED QUESTIONS
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
What type of clothes should we wear in summer?
What produces more severe burns, boiling water or steam?
Evaporation takes place from the
Which of the following are also considered to be the states of matter ?
- Plasma
- Platelets
- BEC
- BHC
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
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 is humidity measured?
Give a geographical reason:
Air becomes saturated.
The process of evaporation is not a good technic to separate salt from seawater give a reason.
