Answer:
(a) for 43.75 mm rod, the temperature is 121.97 ⁰C
(b) for 87.50 mm rod, the temperature is 80.17 ⁰C
(c) for 175.00 mm rod, the temperature is 53.46 ⁰C
Explanation:
Given;
L = 175 mm = 0.175 m
D = 5mm = 0.005
= 200°C
T∞ = 20°C
Heat transfer coefficient h = 30 W/m²·K
Thermal conductivity of brass K = 133 W/m.°C
where;
T is the temperature of the rod at different casting distance,
Part (a) for 43.75 mm rod
Part (b) for 87.50 mm rod
Part (c) for 175.00 mm rod