Advertisements
Advertisements
प्रश्न
Explain the following:
Why is the cooling in a refrigerator kept near the top?
Advertisements
उत्तर
Inside the refrigerator, cooling takes place by convection. The freezing chamber at the top produces cool and heavy air which descends and hot air from below goes up setting convection current. Thus, cooling in a refrigerator is kept near the top.
APPEARS IN
संबंधित प्रश्न
Write down the temperature of the lower fixed point on the Fahrenheit scale.
Draw a neat labelled diagram of a laboratory thermometer.
Two substances A and B have specific heats c and 2 c respectively. If A and B are given Q and 4Q amounts of heat respectively, the change in their temperatures is the same. If the mass of A is m, what is the mass of B?
At 0°C and 760 mm Hg pressure, a gas occupies a volume of 10Q cm3. The Kelvin temperature (Absolute temperature) of the gas is increased by one-fifth while the pressure is increased one and a half times. Calculate the final volume of the gas. [80 cc.]
Is it correct to say that heat is the cause of temperature?
State one use of each of the following type of thermometer:
Clinical thermometer
Convert the following temperature into Celsius scale:
113oF
While a substance is undergoing a change of state, the temperature of the body remains ______.
