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प्रश्न
Select the correct alternative
Which of the statement is correct
पर्याय
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
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.
Water is a bad conductor of heat.
Fill in the blank
_________ determines the degree of hotness or coldness of a body.
Fill in the blank
Black and dull surfaces are ______ of heat.
Name two substances which expand on heating.
One end of a steel girder in a bridge is not fixed, but is kept on roliers. Give the reason.
Describe one experiment to show that liquids expand on heating.
Why is a tea kettle provided with an ebonite handle ?
Why is an oven made of double walls with the space in between filled with cork ?
Explain why we wear woolen clothes in winter.
What are the effects of heat?
