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प्रश्न
A small gap is left between two iron rails of the railway track. Why?
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उत्तर
Gaps are left in the railway tracks because the tracks gets heated during the day and as a result they increase in length. If the gaps are not provided, the railway line would buckle outward and may cause derailment.
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संबंधित प्रश्न
Fill in the blank
The temperature of a normal human body is ________.
State the temperature of ice point on the Celsius scale.
Convert – 40°F to the Celsius scale.
Fill in the blank:
°C is the unit of ......................
Define one joule of heat.
State three main characteristics of a thermometric substance.
Explain the following:
In a solid, heat is not transferred by the process of convection.
Who am I?
I get heated due to the land or water near me
Figure (a–d) shows the readings on four different thermometers. Indicate which of the reading shows the normal human body temperature?
