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प्रश्न
Name a substance which is an insulator of heat.
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उत्तर
Wood is an insulator of heat.
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संबंधित प्रश्न
Define temperature and write its S.I. unit.
A given mass of water is cooled from 10°C to 0°C. State the volume changes you will observe. Represent these changes on a temperature-volume graph.
Two bodies at different temperatures are placed in contact with each other. State the direction in which heat flows.
What is the unit of coefficient of linear expansion?
The following figure shows a copper washer. Explain, giving reasons, whether the following characteristics of the washer increase, decrease, or remain the same when it is heated.
(a) Internal diameter
(b) Volume
(c) Mass
(d) Density
(e) External diameter
Assertion: When water is heated up to 100°C, there is no raise in temperature until all water gets converted into water vapour.
Reason: Boiling point of water is 10°C.
______ determines the direction of the flow of heat.
Figure (a–d) shows the readings on four different thermometers. Indicate which of the reading shows the normal human body temperature?
