Q). Explain, in terms of SPECIFIC HEAT CAPACITY, why the climate of a harbour town is more temperate than that of a town in a desert at same latitude ?

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Solution

Specific heat capacity of a substance is its ability to retain heat. You must have noticed that sand gets quickly heated up and cools down quickly too. This means sand has got low specific heat capacity. It is just like a vessel with low capacity, it will fill up quickly and drain quickly as well.
Now in deserts, sands get quickly heated up under the sun in the day time because of its low heat capacity, this creates a very hot climate in day time there. While in the night sand loses heat very fast and cools down and thereby bringing up a drastic temperature fall. This results in extreme variation of temperature.
But you must have observed that water don’t easily get heated, neither water cools off very fast. This means water has got a higher heat capacity. Thus in the day time near harbours, under the sun, sea water takes a longer time to get heated up therefore, climate do not get heated up fast. On the other hand in the night time water takes a longer time to cool down which avoids drastic temperature falls. This results in moderate climate at harbours.

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Q. Explain why (a) Two bodies at different temperatures T₁and T₂ if brought in thermal contact do not necessarily settle to the mean temperature (T₁ + T₂ )/2. (b) The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat. (c) Air pressure in a car tyre increases during driving. (d) The climate of a harbour town is more temperate than that of a town in a desert at the same latitude.

Q. Explain why
(a) Two bodies at different temperatures T

_{1}

and T

_{2}

if brought in thermal contact do not necessarily settle to the mean temperature (T

_{1}

_{2}

)/2
(b) The coolant in a chemical or a nuclear plant (i.e. the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat
(c) Air pressure in a car tyre increases during driving
(d) The climate of a harbour town is more temperate than that of a town in a desert at the same latitude

Explain why

(a) Two bodies at different temperatures T₁ and T₂ if brought in thermal contact do not necessarily settle to the mean temperature (T₁ + T₂)/2.

(b) The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat.

(d) The climate of a harbour town is more temperate than that of a town in a desert at the same latitude.

Q. Directions:- Study the following information carefully to answer the question given below.

A, B, C, D and E are the five towns out of which two are hill stations and the rest are in plains. Two towns which are in plains have harbours. Four towns out of five are capitals and two are industrial towns. The population of town is less than 5 lakh. It is 20 lakh of one town and more than 50 lakh of two towns. Two towns are on the same latitudes and the other two are on the same longitudes. Latitudes and longitudes of both the harbours are different and out of these, one is an industrial town. The population of both the industrial towns is more than 50 lakh. The longitudes of one hill station and one of the industrial towns are same. The latitudes and longitudes of the other hill station and the other harbour are different. One industrial town is neither a hill station nor a harbour. None of the hill stations is an industrial town. The hill station of which longitude is the same as that of a harbour, is a capital. B is a hill station while the longitudes of A and E are same. E is a harbour. The latitude of D and C are same and the population of D is 20 lakhs. Both the harbours are capitals one of them is an industrial town.

Which of the following towns have Population of more than 50 lakhs?

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