Heat and Mass Transfer The heat transfer from a hot body to a cold body is directly proportional to the surface area and difference of temperatures between the two bodies. This statement is called Stefan's law Newton's law of heating First law of thermodynamics Newton's law of cooling Stefan's law Newton's law of heating First law of thermodynamics Newton's law of cooling 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 difference of temperatures between the two bodies Directly proportional to the surface area Either (A) or (B) Both (A) and (B) Directly proportional to the difference of temperatures between the two bodies Directly proportional to the surface area Either (A) or (B) Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is Equal to one Less than one Greater than one Equal to Nusselt number Equal to one Less than one Greater than one Equal to Nusselt number ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The logarithmic mean temperature difference (tm) is given by (where Δt1 and Δt2 are temperature differences between the hot and cold fluids at entrance and exit) tm = tm = (Δt1 - Δt2) loge (Δt1/Δt2) tm = loge (Δt1/Δt2)/ (Δt1 - Δt2) tm = loge (Δt1 - Δt2)/ Δt1/Δt2 tm = (Δt1 - Δt2)/ loge (Δt1/Δt2) tm = tm = (Δt1 - Δt2) loge (Δt1/Δt2) tm = loge (Δt1/Δt2)/ (Δt1 - Δt2) tm = loge (Δt1 - Δt2)/ Δt1/Δt2 tm = (Δt1 - Δt2)/ loge (Δt1/Δt2) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Total emissivity of polished silver compared to black body is Same Very much lower Higher More or less same Same Very much lower Higher More or less same ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat is closely related with Liquids Temperature Entropy Energy Liquids Temperature Entropy Energy ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS