Q4-Q6: A device is used to cool hot copper spheres of diameter 5 mm from an average temperature of 200Cto 50C by letting them fall in air at 25°C and latm. Use drag coefficient C, = 0.4 and Whitaker correlation inyour calculations. Assume the spheres fall at their terminal velocities during the process.Q4improve the accuracy? Iteration is not required.) Determine the terminal velocity of a sphere. Is the use of C, = 0.4 appropriate? If not, how to

Re =ρVDμ =VDν chracterstics of air at Ts+T∞2=300+3502= 325 K using data book ν =5.12×10-5m2/s k =…

cool not coPP I in air at 25°C and latm. Use drag coefficient C the spheres fall at their terminal velocities durir terminal velocity of a sphere. Is the use of Cp = eration is not required. spheres of dlameter

cool not coPP I in air at 25°C and latm. Use drag coefficient C the spheres fall at their terminal velocities durir terminal velocity of a sphere. Is the use of Cp = eration is not required. spheres of dlameter

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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Question

Q4-Q6: A device is used to cool hot copper spheres of diameter 5 mm from an average temperature of 200C
to 50C by letting them fall in air at 25°C and latm. Use drag coefficient C, = 0.4 and Whitaker correlation in
your calculations. Assume the spheres fall at their terminal velocities during the process.
Q4
improve the accuracy? Iteration is not required.
) Determine the terminal velocity of a sphere. Is the use of C, = 0.4 appropriate? If not, how to

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