at 5°C is being used to cool apples from an initial temperature of 25° to 10°C. The water flow over the surface of the apple creates a convective heat-transfer coefficient of 10 W/(m2-K). Assume the apple can be described as a sphere with an 8 cm diameter and the geometric center is to be reduced to 10°C. The apple properties include thermal conductivity of 0.4 W/(
at 5°C is being used to cool apples from an initial temperature of 25° to 10°C. The water flow over the surface of the apple creates a convective heat-transfer coefficient of 10 W/(m2-K). Assume the apple can be described as a sphere with an 8 cm diameter and the geometric center is to be reduced to 10°C. The apple properties include thermal conductivity of 0.4 W/(
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Water at 5°C is being used to cool apples from an initial temperature of 25° to 10°C. The
water flow over the surface of the apple creates a convective heat-transfer coefficient
of 10 W/(m2-K). Assume the apple can be described as a sphere with an 8 cm diameter
and the geometric center is to be reduced to 10°C. The apple properties include thermal
conductivity of 0.4 W/(m-K), specific heat of 3.950 kJ/(kg-K), and density of 940 kg/m3
a. Determine the time that the apples must be exposed to the water.
b. If the apple is submerged only for 2 hours, what will be its center temperature?
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