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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
Fill in the blank
On heating a body, its temperature _______.
Fill in the blank
We use a ________ for measuring the temperature of a body.
Fill in the blank
Still air is an __________ of heat.
Name the instrument used to measure the temperature of a body.
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.
Iron rims are heated before they are fixed on the wooden wheels. Explain the reason.
In summer, ice is kept wrapped in a gunny bag. Explain the reason.
What are the effects of heat?
When we heat them the force of attraction between the molecules decreases and the ice cubes become ______.
______ is the only matter on the Earth that can be found naturally in all three states.
