Advertisements
Advertisements
प्रश्न
Why is an oven made of double walls with the space in between filled with cork ?
Advertisements
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.
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.
Name the instrument used to measure the temperature of a body.
Iron rims are heated before they are fixed on the wooden wheels. Explain the reason.
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.
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into the water. Explain the reason.
Why do we use cooking utensils made up of copper.
In summer, ice is kept wrapped in a gunny bag. Explain the reason.
Why is a ventilator provided in a room?
______ is greater for liquids than solids and it is maximum in gases.
