9.) A 50-kg box of beef at 8 C having a water content of 72 percent is to be frozen to a temperature of -30 C in 4 h. Freezing point is at -2 C. Specific heat of the beef above freezing is 3.23 kJ/kg.K and below freezing is 1.5 kJ/kg.K. Determine (a) the total amount of heat that must be removed from the beef, (b) the average rate of heat removal from the beef.

9.) A 50-kg box of beef at 8 C having a water content of 72 percent is to be frozen to a temperature of -30 C in 4 h. Freezing point is at -2 C. Specific heat of the beef above freezing is 3.23 kJ/kg.K and below freezing is 1.5 kJ/kg.K. Determine (a) the total amount of heat that must be removed from the beef, (b) the average rate of heat removal from the beef.

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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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

9.) A 50-kg box of beef at 8 C having a water content of 72 percent is to be frozen to a
temperature of -30 C in 4 h. Freezing point is at -2 C. Specific heat of the beef above freezing is
3.23 kJ/kg.K and below freezing is 1.5 kJ/kg.K. Determine (a) the total amount of heat that must
be removed from the beef, (b) the average rate of heat removal from the beef.

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