Heat and Mass Transfer Depending on the radiating properties, a body will be opaque when P = 0, x = 1 and a = 0 P=1, x = 0 and a = 0 P = 0, x = 0 and a = 1 X = 0, a + p = 1 P = 0, x = 1 and a = 0 P=1, x = 0 and a = 0 P = 0, x = 0 and a = 1 X = 0, a + p = 1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat flows from one body to other when they have Different atomic structure Different specific heat Different temperatures Different heat contents Different atomic structure Different specific heat Different temperatures Different heat contents ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit Thickness Area Time Temperature Thickness Area Time Temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Metals are good conductors of heat because They contain free electrons Their atoms are relatively far apart They have high density Their atoms collide frequently They contain free electrons Their atoms are relatively far apart They have high density Their atoms collide frequently 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 Planck's law Kirchhoff's law Wien's law Stefan's law Planck's law Kirchhoff's law Wien's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According of Kirchhoff's law Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body Radiant heat is proportional to fourth power of absolute temperature Emissive power and absorptivity are constant for all bodies Emissive power depends on temperature Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body Radiant heat is proportional to fourth power of absolute temperature Emissive power and absorptivity are constant for all bodies Emissive power depends on temperature ANSWER DOWNLOAD EXAMIANS APP
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