QUESTION $8$

A $6-$mm$-$diameter electrical transmission line carries an electric current of $43$A and has a resistance of $0\mathrm{.}002$ ohm per meter length. Determine the surface temperature of the wire during a windy day in $C$ when the air

temperature is $14C$ and the wind is blowing across the transmission line at $40k\frac{m}{h}.$ Write your answers in $2$ decimal figures. Use the Churchill and Bernstein correlation.