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प्रश्न
Select good and bad conductors of heat from the following:
copper, mercury, wood, iron, air, saw-dust, cardboard, silver, plastic, wool.
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उत्तर
Good conductors — Mercury, copper, silver, iron.
Bad conductors — Wood, air, saw dust, plastic, wool, cardboard.
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संबंधित प्रश्न
Write true or false for a given statement.
Water is a bad conductor of heat.
Fill in the blank
Still air is an __________ of heat.
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.
Name a solid which is a good conductor of heat.
In summer, ice is kept wrapped in a gunny bag. Explain the reason.
Explain why we wear woolen clothes in winter.
Why is a ventilator provided in a room?
What are the land and sea breezes? Explain their formation.
