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couple

 
   
A pair of forces of magnitude F that are equal and opposite but applied at points separated by a distance d perpendicular to the forces. The combined moment of the forces produces a torque Fd on the object on which they act (See moment of force).  

 

 

 
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coupling reaction
 
   

 

Other Terms : zone refining | Algol | quartz

 

 

 
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