The outer face of a rectangular slab of equal thickness of iron and brass are maintained at `100^(@)C` and `0^(@)C`, respectively. Find the temperature of the interface. The conductivities of iron and brass are 14 and `126 Wm^(-1) K^(-1)` respectively.

The outer faces of a rectangular slab made of equal thickness of iron and brass are maintained at 100^(@)C and 0^(@)C respectively. The temperature at the interface is (Thermal conductivity of iron and brass are 0.2 and 0.3 respectively)

The outer faces of a rectangular slab made of equal thickness of iron and brass are maintained at 100^(@)C and 0^(@)C respectively. The temperature at the interface is (Thermal conductivity of iron and brass are 0.2 and 0.3 respectively)

Two flat metal plates area placed with their surfaces in contact and their outer surfaces are maintained at temperatures of 100^(@)C and 0^(@)C respectively. If the thicknes of the plates are 2cm and 1cm and their thermal conductivities are 10cal m^(-1)K^(-1)s^(-1) and 20 cal m^(-1)K^(-1)s^(-1) respectively, find the temperature of the surfaces in contact.

A sheet of rubber and a sheet of cardboard, each 5 mm thick are pressed together and their outer faces are maintained respectively at 0°C and 18°C. If the thermal conductivities of rubber and cardboard are respectively 0.13 and 0.05 "Wm"^(-1) "K"^(-1) . find the quantity of heat which flows in one hour across a piece of composite sheer if area is 100 "cm"^(-2) .

The lengths of an iron and a zinc rod at 0^(@)C are 25.55 cm and 25.5 cm respectively. At what temperature will their lengths be equal? Coefficients of linear expansion of iron and zinc are 10 times 10^(-6@)C^(-1) and 30 times 10^(-6@)C^(-1) respectively.

A composite wall of area A is made of equal thickness of lead and iron having thermal conductivities K and 2K, respectively. The temperature on the two sides of the composite wall are 100^(@)C and 0^(@)C with the layer on the hotter side. Calculate the steady -state temperature of the lead-iron interface.

An iron bar ( L_(1) = 0.1 m, A_(1) = 0.02 m^(2) , K_(1) = 79 Wm^(-1) K^(-1) ) and a brass bar (L_(2)=0.1 m , A_(2) = 0.02 m^(2), K_(2) = 109 Wm^(-1)K^(-1) ) are soldered end to end as shown in fig. the free ends of iron bar and brass bar are maintained at 373 K and 273 K respectively. Obtain expressions for and hence compute (i) the temperature of the juction of the two bars, (ii) the equivalent thermal conductivity of the compound bar and (iii) the heat current through the compound bar. .