1
Question
True or false?
(a) When heat is taken away from a substance it expands.
(b) The heat absorbed by a substance is not dependent upon its mass.
(c) The unit of specific heat is a °C.
(d) A bimetallic strip is used in an electric heater to keep the water temperature constant.
True or false?
(a) When heat is taken away from a substance it expands.
(b) The heat absorbed by a substance is not dependent upon its mass.
(c) The unit of specific heat is a °C.
(d) A bimetallic strip is used in an electric heater to keep the water temperature constant.
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Solution
(a) False
Description: When heat is taken away from a substance it contracts because temperature of the substance decreases.
(b) False
Description: Heat capacity of a substance does not depend on the mass of the substance but the amount of heat absorbed by the substance depends upon the mass.
(c) False
The amount of heat required to raise the temperature of 1 kg of a substance by 10C is called the specific heat of the substance. Its SI unit is Cal/(kg 0C).
(d) True
(a) False
Description: When heat is taken away from a substance it contracts because temperature of the substance decreases.
(b) False
Description: Heat capacity of a substance does not depend on the mass of the substance but the amount of heat absorbed by the substance depends upon the mass.
(c) False
The amount of heat required to raise the temperature of 1 kg of a substance by 10C is called the specific heat of the substance. Its SI unit is Cal/(kg 0C).
(d) True
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