The temperature at the inner radius (r 1 = 5 cm) is 125°C and at the outer radius (r 2 = 10 cm) is 60°C in a spherical shell. Calculate the rate of heat fl ow through, the shell if k of the shell...

The temperature at the inner radius (r₁
= 5 cm) is 125°C and at the outer radius (r₂
= 10 cm) is 60°C in a spherical shell. Calculate the rate of heat fl ow through, the shell if k of the shell material is 2 W/mK. What would be the temperature of the shell material at a raidus of 7.5 cm? Hints: Use Eq. (1.24) to find