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प्रश्न
Fill in the blank
We use a ________ for measuring the temperature of a body.
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उत्तर
We use a thermometer for measuring the temperature of a body.
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संबंधित प्रश्न
Write true or false for a given statement.
Water is a bad conductor 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.
Why do telephone wires sag in summer ?
One end of a steel girder in a bridge is not fixed, but is kept on roliers. Give the reason.
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.
Why is a ventilator provided in a room?
Why are chimneys provided over furnace in factories?
During day time, air blows from ______ to ______.
