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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
What is matter? What is it composed of?
State three factors on which depend the linear expansion of a metal rod on heating.
A cubical metal solid block is heated. How will its volume change?
100 ml of each of the following liquid is heated from 10°C to 50°C. Which will expand more : (a) water (b) benzene (c) alcohol?
An iron washer is heated. State the effect on its internal diameter.
Give scientific reason.
The telephone wires which sag in summer become straight in winter.
At what temperature the pure water has (a) maximum density (b) minimum volume?
What is meant by thermal expansion?
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.
Give reason for the following
An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not.
