A copper rod and an aluminum rod of the same length and cross-sectional area are

Question

A copper rod and an aluminum rod of the same length and cross-sectional area are attached end to end(Figure 1) . The copper end is placed in a furnace maintained at a constant temperature TCu = 450 C . The aluminum end is placed in an ice bath held at a constant temperature of 0.0C.

I got 280 my first try and was wrong. I really need help with this one

Calculate the temperature at the point where the two rods are joined.

A copper rod and an aluminum rod of the same length and cross-sectional area are attached end to end(Figure 1) . The copper end is placed in a furnace maintained at a constant temperature TCu = 450 C . The aluminum end is placed in an ice bath held at a constant temperature of 0.0C.

I got 280 my first try and was wrong. I really need help with this one

Calculate the temperature at the point where the two rods are joined.

Explanation / Answer

let the temp. of junction is T

by heat transfer , (T-T1)K1A1/L1+(T2-T)K2A2/L2 = 0

now, (T-0)A*205/L+(450-T)A*385/L = 0

590T = 173250

so , T = 293.64centigrade

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