Athin metal bar, insulated along its sides, is composed of five different metal connected together. the left end bar is immersed in a heat bath at 100°c and right end in a heat bath at 0°c. starting at the left end, the pieces and lenghts are steel(2cm), brass(3cm), copper(1cm), aluminum(5cm) and silver(1cm). what is the temperature of the steel/brass interface?

T = 61.06 °C  

Explanation:

given data:

a thin metal bar consist of 5 different material.

thermal conductivity of ---

K {steel} = 16 Wm^{-1} k^{-1}

K brass = 125 Wm^{-1} k^{-1}

K copper = 401 Wm^{-1} k^{-1}

K aluminium =30Wm^{-1} k^{-1}

K silver = 427 Wm^{-1} k^{-1}

WE KNOW THAT

total resistance of bar = R steel + R brass + R copper + R aluminium + R silver

let T is the temperature at steel/brass interference

will be constant throughtout the bar

therefore we have

solving for T  we get

T = 61.06 °C  

the answer is b

explanation: