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प्रश्न
Select the correct alternative
Which of the statement is correct
विकल्प
Iron rims are cooled before they are placed on cartwheels
A glass stopper gets tight on warming the neck of the bottle
Telephone wires sag in winter, but become tight in summer
A little space is left between two rails on a railway track
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उत्तर
A little space is left between two rails on a railway track
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
All solids expand by the same amount when heated to the same rise in temperature.
Why do telephone wires sag in summer ?
Why are gaps left between successive rails on a railway track ?
One end of a steel girder in a bridge is not fixed, but is kept on roliers. Give the reason.
State which expands more, when heated to the same temperature : solid, liquid or gas ?
Name a liquid which is a good conductor of heat.
Why is an oven made of double walls with the space in between filled with cork ?
Why are quilts filled with fluffy cotton?
Why is a ventilator provided in a room?
______ is greater for liquids than solids and it is maximum in gases.
