To warm up milk, it is poured into a thin-walled glass whose dimeter is 6 cm. The height of the milk in the glass is 7 cm. The glass is placed into a large pan filled with hot water at 60o C. The milk is stirred constantly, so that its temperature is always uniform. If the heat transfer coefficient between the water and the glass is 120 W/m2oC, determine how long it will take for the milk to warm up from 3o C to 38o C. Take the properties of the milk to be the same as those of water. Can the milk in this case be treated as a lumped system> Why?
To warm up milk, it is poured into a thin-walled glass whose dimeter is 6 cm. The height of the milk in the glass is 7 cm. The glass is placed into a large pan filled with hot water at 60o C. The milk is stirred constantly, so that its temperature is always uniform. If the heat transfer coefficient between the water and the glass is 120 W/m2oC, determine how long it will take for the milk to warm up from 3o C to 38o C. Take the properties of the milk to be the same as those of water. Can the milk in this case be treated as a lumped system> Why?
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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To warm up milk, it is poured into a thin-walled glass whose dimeter is 6 cm. The height of the milk in the glass is 7 cm. The glass is placed into a large pan filled with hot water at 60o C. The milk is stirred constantly, so that its temperature is always uniform. If the heat transfer coefficient between the water and the glass is 120 W/m2oC, determine how long it will take for the milk to warm up from 3o C to 38o C. Take the properties of the milk to be the same as those of water. Can the milk in this case be treated as a lumped system> Why?
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