A beach ball 20 cm in diameter traveling at a speed of 50 m/s in still air at 30°C is found to have a drag of 8 N. (a) Find the velocity at which the drag of a 60 cm sphere immersed in water at 15°C can be found from the above data. (b) What is the drag of the larger sphere at this velocity?

A beach ball 20 cm in diameter traveling at a speed of 50 m/s in still air at 30°C is found to have a drag of 8 N. (a) Find the velocity at which the drag of a 60 cm sphere immersed in water at 15°C can be found from the above data. (b) What is the drag of the larger sphere at this velocity?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.49P

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Question

A beach ball 20 cm in diameter traveling at a speed of 50 m/s in still air at 30°C is found to have a drag of 8 N.

(a) Find the velocity at which the drag of a 60 cm sphere immersed in water at 15°C can be found from the above data.

(b) What is the drag of the larger sphere at this velocity?

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