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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
Write down the temperature of the lower fixed point on the Fahrenheit scale.
Write down the temperature of upper fixed point,, on the Fahrenheit scale.
Who is telling the truth?
Heat flows from an object at higher temperature to an object at lower temperature.
What is the normal temperature of human body?
One liter of mercury at 100C is heated to 300C. Find the increase in the volume of mercury. The coefficient of cubical expansion of mercury is 1.8 X 10-4 0C-1.
Assertion: Temperature is the measure of heat energy.
Reason: Energy is the capacity to do work.
______ is the degree of hotness or coldness of a body.
