A 10 cm diameter orange has properties similar to those of water. the orange was at 20 o c. and suddenly, it is subjected to refrigerator air of 4 o c. the air circulation in the refrigerator results in the air velocity over the orange surface at 0.1 m/s. determine the center and the surface temperatures of the orange after 5 min. with this air circulation, free convection may be negligible. radiation is also negligible.
