Heat and Mass Transfer Absorptivity of a body will be equal to its emissivity When system is under thermal equilibrium At critical temperature At all temperatures At one particular temperature When system is under thermal equilibrium At critical temperature At all temperatures At one particular temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as Stefan's law Wien's law Planck's law Kirchhoff's law Stefan's law Wien's law Planck's law Kirchhoff's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Stefan's law, the total radiation from a black body per second per unit area is proportional to T2 T Absolute temperature T5 T2 T Absolute temperature T5 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The total radiation from a black body per second per unit area is ________ fourth power of the absolute temperature. This statement is known as Stefan Boltzmann law. Inversely proportional to None of these Equal to Directly proportional to Inversely proportional to None of these Equal to Directly proportional to ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Newton's law of cooling, the heat transfer from a hot body to a cold body is Directly proportional to the surface area Directly proportional to the difference of temperatures between the two bodies Either (A) or (B) Both (A) and (B) Directly proportional to the surface area Directly proportional to the difference of temperatures between the two bodies Either (A) or (B) Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat flows from one body to other when they have Different specific heat Different temperatures Different heat contents Different atomic structure Different specific heat Different temperatures Different heat contents Different atomic structure ANSWER DOWNLOAD EXAMIANS APP
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