Discuss the below:
Q: A copper sphere of 10-mm diameter, initially at a prescribed elevated temperature T;, is quenched in a saturated (1 atm) water bath. Using the lumped capacitance method, estimate the time for the sphere to cool
(a) From Ti = 130°C to 110°C and
(b) From Ti = 550°C to 220°C. Plot the temperature history for each quenching process.