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प्रश्न
State three main characteristics of a thermometric substance.
उत्तर
The main characteristics of the thermometric substances are
(a). The substance should have a high coefficient of expansion so that it is sensitive to the smallest change in temperature
(b). The substance should have uniform expansion all over its entire volume
(c). The substance should have minimum specific heat so that it absorbs minimum heat from the body under measurement.
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संबंधित प्रश्न
Explain the construction of a calorimeter. Draw the necessary figure.
Two substances A and B have specific heats c and 2 c respectively. If A and B are given Q and 4Q amounts of heat respectively, the change in their temperatures is the same. If the mass of A is m, what is the mass of B?
Calorie is the unit of :
Define calorie. How many joules make one calorie?
Explain the three modes of transfer of heat.
Give a scientific reason for the following:
Old quits are less warm than the new ones.
The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.
Explain:
(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?
