Question

how to solve this problem

Answer 1

hey
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2. when hot tea is taken in the cup, due to narrow shale of the cup , the surface area is very small due to small surface area , evaporation is slow and cooling caused by evaporation is less and hot tea remains appreciably hot for a longer period of time .On the other hand saucer has a large surface area and the rate of eveporation is faster due to large surface area and the cooling caused is also fast and it makes convenient to sip
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3. earthen pots has large number of pores through which some water keeps sweeping to the outside of the pot . this water evaporates continuously by taking latent heat of vaporisation from earthen pot and reamaining water
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hope helped
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