Temperature Response in Cooling a Wire. A small copper wire with a diameter of 0.792 mm and initially at 366.5 K is suddenly immersed in a liquid held constant at 311 K. The convection coefficient h = 85.2 W/m2 · K. The physical properties can be assumed constant and are k = 374 W/m · K, cp = 0.389 kJ/kg · K, and ρ = 8890 kg/m3.
|A1:||Ans. (a) t = 5.66 s|
Quenching Lead Shot in a Bath. Lead shot having an average diameter of 5.1 mm is at an initial temperature of 204.4°C. To ...