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प्रश्न
What are the effects of heat?
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उत्तर
- Expansion
- Increase in temperature
- Change in state
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संबंधित प्रश्न
Fill in the blank
Liquids expand _______ than the solids.
Fill in the blank
Still air is an __________ of heat.
Fill in the blank
Black and dull surfaces are ______ of heat.
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.
State one application of thermal expansion of liquids.
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.
Explain why we wear woolen clothes in winter.
Why are quilts filled with fluffy cotton?
______ is greater for liquids than solids and it is maximum in gases.
