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Question
We understand 'temperature' as a measure of the 'hotness' or 'coldness' of a body. Which of the following quantities changes with a change in temperature?
We understand 'temperature' as a measure of the 'hotness' or 'coldness' of a body. Which of the following quantities changes with a change in temperature?
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Solution
The correct options are
B Length of a metal rod.
C Density of a liquid.
D Pressure of a gas kept in a closed chamber.
Let us look at some real life examples.
(1) Density of water is seen to be 1 kg/m3 only at 40C. At 800C, it is seen to get reduced to 0.971 kg/m3.
(2) Length of the railway tracks increases on heating.
(3) If a car tyre is heated, it explodes at some point due to increase in its air pressure.
From the above observations we can imply that: the density, length and pressure directly depends on the temperature whereas mass does not change in any of the above cases.
B Length of a metal rod.
C Density of a liquid.
D Pressure of a gas kept in a closed chamber.
Let us look at some real life examples.
(1) Density of water is seen to be 1 kg/m3 only at 40C. At 800C, it is seen to get reduced to 0.971 kg/m3.
(2) Length of the railway tracks increases on heating.
(3) If a car tyre is heated, it explodes at some point due to increase in its air pressure.
From the above observations we can imply that: the density, length and pressure directly depends on the temperature whereas mass does not change in any of the above cases.
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