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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.
Fill in the blank
Black and dull surfaces are ______ of heat.
Select the correct alternative
The temperature of pure melting ice is
The fig. shows a glass tumbler containing hot milk which is placed in a tub of cold water. State the direction in which heat will flow.
Describe one experiment to show that liquids expand on heating.
State one application of thermal expansion of liquids.
Name a liquid which is a good conductor of heat.
Why do we use cooking utensils made up of copper.
Why are chimneys provided over furnace in factories?
______ is greater for liquids than solids and it is maximum in gases.
