HEAT IS A FORM OF ENERGY WHICH CAUSES SENSATION OF HOTNESS OR COLDNESS.
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What is equilibrium temperature?
The transfer of heat continues till the temperature of both the bodies becomes the same. This temperature is called as equilibrium temperature.
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What is the heat energy absorbed by a body?
Q= MCT,
Q- heat energy absorbed
M- mass of the body
C- specific heat capacity of the body
t- rise in the temperature of the body
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Why is water used as a coolant in car radiators?
since water has a high specific heat capacity therefore it can absorb a large amount of heat from the car engine without any substantial increase in its temperature.
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WHY DOES THE HOT MILK GET COLD?
THE TEMPERATURE OF THE SURROUNDINGS IS LESS THAN THE TEMPERATURE OF THE MILK. SO MILK LOSES ITS HEAT TO THE SURROUNDINGS AND COOLS DOWN.
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What are the factors on which the quantity of heat gained by a body depends upon?
1. Mass of the substance
2. nature of the substance
3. rise in temperature of the substance.
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What are the S.I units of specific heat capacity?
J/kg/oC
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How does wine bottles placed under water in cold countries prevent them from freezing?
Because of high specific heat capacity of water, it gives off large amount of heat which prevents the wine from freezing.
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HOW DOES THE HEAT FLOWS?
Heat flows from a body at higher temperature to a body at lower temperature.
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Define the traditional units of heat.
The amount of heat energy required to raise the temperature of 1 g of water by 1degree celcius is called 1 calorie.
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What is TEMPERATURE?
TEMPERATURE IS THE DEGREE OF HOTNESS OR COLDNESS OF A BODY.
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What is Heat Capacity?
The heat capacity of a body is the quantity of heat required to raise the temperature of whole body by 1 oC.
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What is the S.I unit of heat? Relate this unit with calorie.
Joules. 1 Cal=4.186 J
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What is specific heat capacity?
Specific heat capacity of a substance is the amount of heat required to change the temperature of unit mass of the substance by one unit.
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Water has a specific heat of capacity of 4186 J/kg/oC and silver has 236.1 J/kg/oC. What does this imply?
this means water requires more amount of heat as compared to silver to raise its temperature by 1 oC.
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What is S.I unit of Heat Capacity?Give its Formula.