An iron block of unknown mass at 185°F is dropped into an insulated tank that contains 0.8 ft of water at 70°F. At thesame time, a paddle wheel driven by a 300-W motor is activated to stir the water. Thermal equilibrium is established after10 min with a final temperature of 75°F. Use data from the tables.Determine the mass of the irnn block. (You must provide an answer before moving on to the next part.)The mass of the iron block islbm.

At first, determine the mass of water, mw, in which the iron block is dropped.

Answered: An iron block of unknown mass at 185°F…

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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A 70-lbm copper block initially at 220°F is dropped into an insulated tank that contains 1.2 ft3 of water at 65°F. Determine the final equilibrium temperature.
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A cylinder with a piston contains 1 kg of saturated water vapor at the temperature T = 100◦C. The vapor is condensed at constant pressure until all of it changes into liquid. Using the property tables provided with the exam, evaluate the heat Qout released by the system. Evaluate the heat in three ways, using the following relations: (a) ∆U = Q − W, (2.3) (b) Q = ∆H at P = constant, (2.4) (c) Q = T ∆S at T = constant. (2.5) Discuss your results. If any of the above relations is not applicable, explain why.
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