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प्रश्न
What do you mean by heat?
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उत्तर
Heat is defined as a form of energy which flows from one point to another on account of temperature difference.
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संबंधित प्रश्न
Fill in the blank
The temperature of a normal human body is ________.
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.
A deep pond of water has its top layer frozen during winter. State the expected temperature of water layer (i) Just in contact with ice and (ii) At the bottom of pond.
Name or state the following:
The law which states that pressure remaining constant the volume of a given mass of dry gas is directly proportional to its absolute [Kelvin] temperature.
What is the unit of coefficient of volume expansion?
Explain the following:
Water is heated generally from below.
What is meant by the lower and upper fixed points of a thermometer?
Give a scientific reason for the following:
On a hot sunny day, it is advisable to wear light coloured clothes.
Figure (a–d) shows the readings on four different thermometers. Indicate which of the reading shows the normal human body temperature?
Explain the following effects of heat.
Change in temperature
