The steady-state temperature distribution in a one-dimensional wall of thermal conductivity k and thickness l is of the form t= ar' + br' + cr + d. derive expressions for the heat generation rate per unit volume in the wall and the heat fluxes at the two wall faces ( 0, l)

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false

Heat transfer by is the fastest mode of heat transfer that requires no intervening medium. a)-conduction b)-convection c)-radiation d)-conduction and convection

Consider a 1.2 meter high and 2 meter wide glass window whose thickness is 6 mm and thermal conductivity is 0.78 w/m °c. the room temperature is maintained at 24 °c, while the outdoor temperature is -5 °c. the convective heat transfer coefficients on the inner and outer surfaces of the window are 10 w/m2 °c and 25 w/m2 °c respectively. (a) draw the thermal resistance network, etermine the steady rate of heat transfer t e glass window (c) determine the temperature of the inner surface of the window