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प्रश्न
A cubical metal solid block is heated. How will its volume change?
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उत्तर
When a solid is heated, it expands in all directions. The volume of a cube also increases.
Let V0 be the volume of cube of side L0 at 0°C. i.e. V0 = L30 – V
When temperature increases to t°C each side increases to Vt
∴ Vt = L3t
Increase in volume = (Vt — V0) [L3t — L30]
Increase in temperature = (t — O)°C = t°C
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संबंधित प्रश्न
What do you understand by thermal expansion of a substance?
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?
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?
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.
Describe an experiment to showthat air expands on heating.
What is the velocity of thermal radiations?
Borosilicate glass do not expand much on being heated.
Analogy:
Expansion is length:: Linear expansion.
Expansion in volume:: ______.
