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प्रश्न
Iron rims are heated before they are fixed on the wooden wheels.
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उत्तर
Iron rims are made slightly smaller in diameter than the wooden wheel and on heating, wheel expands and can easily slip over the wooden wheel and on cooling the rim contracts and MAKES A TIGHT FIT OVER the wooden wheel.
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संबंधित प्रश्न
Equal volumes of different liquids expand by a different amount when they are heated to the same rise in temperature.
State three factors on which depend the linear expansion of a metal rod on heating.
Two identical rods of copper are heated to different temperatures — one by 5°C and the other by 10°C. Which rod will expand more?
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?
An iron washer is heated. State the effect on its mass.
The diagram shows a sketch graph showing a change in volume of a given mass of ice at -5°C to water at 15°C.
(i) Why does the temperature along BC remain constant?
(ii) When is the volume of water minimum?
(iii) At what temperature does water have maximum density? Explain.
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.
