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प्रश्न
Explain the following:
Water is heated generally from below.
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उत्तर १
Water is heated generally from below because water itself is a bad conductor of heat and the transfer of heat through convection take place vertically upwards
उत्तर २
Water is heated from below because water is heated by process of convection and in process of convection heat always flows in upward direction from downward direction.
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संबंधित प्रश्न
How is the size of a degree defined on a Celsius scale ?
The temperature of a body rises by 1°C. What is the corresponding rise on the (a) Fahrenheit scale (b) Kelvin scale?
Fill in the blank:
°C is the unit of ......................
Write down the SI unit of latent heat.
Do all substances expand on heating? Give examples.
Why are bridges made of steel girders put on rollers?
Convert the following temperature into Celsius scale:
95oF
When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?
Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.
Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.
