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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.
Equal volumes of different liquids expand by different amounts when they are heated to the same rise in temperature.
Write true or false for a given statement.
Land and sea breezes are convection currents of cold and warm air.
Fill in the blank
We use a ________ for measuring the temperature of a body.
Why do telephone wires sag in summer ?
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why ?
Describe one experiment to show that liquids expand on heating.
State one application of thermal expansion of liquids.
Select good and bad conductors of heat from the following:
copper, mercury, wood, iron, air, saw-dust, cardboard, silver, plastic, wool.
Why is an oven made of double walls with the space in between filled with cork ?
When we heat them the force of attraction between the molecules decreases and the ice cubes become ______.
