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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
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?
A metal plate is heated. State three factors on which the increase in its area will depend.
Describe an experiment to showthat air expands on heating.
Give scientific reason.
The telephone wires which sag in summer become straight in winter.
Solids ______ on heating and ______ on cooling.
Thermal expansion is always a nuisance.
What is thermal expansion?
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.
The expansion in volume is called linear expansion.
