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प्रश्न
Write true or false for a given statement.
Heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact.
पर्याय
True
False
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उत्तर
True.
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संबंधित प्रश्न
Write true or false for a given statement.
All solids expand by the same amount when heated to the same rise in temperature.
Write true or false for a given statement.
Telephone wires are kept tight between the two poles in summer.
Write true or false for a given statement.
Solids expand the least and gases expand the most on being heated.
Fill in the blank
In a thermometer, the commonly used liquid is _______
Name two substances which expand on heating.
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.
Select good and bad conductors of heat from the following:
copper, mercury, wood, iron, air, saw-dust, cardboard, silver, plastic, wool.
In summer, ice is kept wrapped in a gunny bag. Explain the reason.
Why do we prefer to wear white or light coloured clothes in summer and black or dark coloured clothes in winter ?
Mention the factors affecting the flow of heat.
