|  | 11. | The interpretation of the above equation is that particle motion is hindered by a drag force. 
 
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|  | 12. | The calculated viscous drag D _ v use entropy changes to accurately predict the drag force. 
 
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|  | 13. | This effect is called the Zener effect after the man who estimated this drag force to 
 
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|  | 14. | Since the drag force is proportional to the area, you'd have 4.7 times less drag force. 
 
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|  | 15. | Assuming no additional drag forces, momentum is conserved. 
 
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|  | 16. | This is the most efficient configuration, as the drag forces on the propeller are the lowest. 
 
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|  | 17. | Newton's drag force theory was finally proved incorrect. 
 
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|  | 18. | The conventional Stokes number will significantly underestimate the drag force for large particle free-stream Reynolds numbers. 
 
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|  | 19. | Since the drag force is proportional to the area, you'd have 4.7 times less drag force. 
 
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|  | 20. | In the drag force case, the relative wind speed decreases subsequently, and so does the drag force. 
 
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