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प्रश्न
Why is an oven made of double walls with the space in between filled with cork ?
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उत्तर
An oven is made of double walls and the space between them is filled with wool, cork etc. because the wool and cork are the insulator of heat. They prevent the heat of the oven to escape.
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संबंधित प्रश्न
Write true or false for a given statement.
Solids expand the least and gases expand the most on being heated.
Fill in the blank
Metals are _______ of heat.
Fill in the blank
Black and dull surfaces are ______ of heat.
Select the correct alternative
Which of the statement is correct
Why do telephone wires sag in summer ?
Select good and bad conductors of heat from the following:
copper, mercury, wood, iron, air, saw-dust, cardboard, silver, plastic, wool.
Explain why the water pipes are covered with cotton during very cold weather.
Why is a ventilator provided in a room?
In ice cubes, the force of attraction between the water molecules is ______.
When heat energy is added to a substance, the kinetic energy of its particles ______ and so the particles move at a higher speed.
