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प्रश्न
What do you understand by thermal expansion of a substance?
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उत्तर
The expansion of a substance on heating is called the thermal expansion of the substance.
संबंधित प्रश्न
The increase in length of a metal rod depends on
Two iron rods – one 10 m long and the other 5 m long, are heated to the same rise in temperature. Which will expand more?
One rod of copper and another identical rod of iron are heated to the same rise in temperature. Which rod will expand more? Give reason.
In the ball and ring experiment, if the ball after heating is left to cool on the ring for sometime, the ball again passes through the ring. Explain the reason.
Iron rims are heated before they are fixed on the wooden wheels.
A metal plate is heated. State three factors on which the increase in its area will depend.
Describe an experiment to show that same volume of different liquids heated to same rise in temperature expand by different amounts.
An iron washer is heated. State the effect on its mass.
An iron washer is heated. State the effect on its external.
What is the velocity of thermal radiations?
Give reasons for the following:
In cold countries, water pipes burst in winter.
Complete the following sentence:
When ice melts its volume ______ and density _______.
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
Thermal expansion is always a nuisance.
Borosilicate glass do not expand much on being heated.
Give reason for the following
An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not.
What is thermal expansion?
What difference do you think heating the solid will make in their molecules?
What type of glassware is used in laboratories? Why?
