An air hockey puck has a mass of 50 g and is 9 cm in diameter. When placed on the air table, a 40 degrees C air film, of thickness 0.12 mm-thickness forms under the puck.   a) Using Sutherlands law, what is the viscosity of the air? b) If the puck is travelling at 10 m/s, assuming a linear velocity profile, what is the force on the puck due to shear stress? c)What is the terminal velocity of the puck?

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
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An air hockey puck has a mass of 50 g and is 9 cm in diameter. When placed on the air table, a 40 degrees C air film, of thickness 0.12 mm-thickness forms under the puck.

 

a) Using Sutherlands law, what is the viscosity of the air?

b) If the puck is travelling at 10 m/s, assuming a linear velocity profile, what is the force on the puck due to shear stress?

c)What is the terminal velocity of the puck?

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