Two $0\mathrm{.}79-$m$-$diameter, $15-$cm$-$long aluminum bars $($k $=176$ W$/$m$$K$)$ with ground surfaces are pressed against each other with a pressure of $20$ atm. The bars are enclosed in an insulation sleeve and, thus, heat transfer from the lateral surfaces is negligible. The top and bottom surfaces of the two$-$bar system are maintained at temperatures of $150\backslash$deg C and $110\backslash$deg C$,$ respectively. Use $\backslash$pi $=22/7.$

Determine the temperature drop at the interface.

The temperature drop at the interface is

$\backslash$deg C$.$Two $0\mathrm{.}79-$m$-$diameter, $15-$cm$-$long aluminum bars $(k=176\frac{W}{m}*K)$ with ground surfaces are pressed against each other with

a pressure of $20$ atm $.$ The bars are enclosed in an insulation sleeve and, thus, heat transfer from the lateral surfaces is

negligible. The top and bottom surfaces of the two$-$bar system are maintained at temperatures of $150C$ and $110C,$

respectively. Use $=\frac{22}{7}.$

Determine the temperature drop at the interface.

The temperature drop at the interface is

$C.$