Which term defines the amount of mechanical work an engine can do per unit of heat energy it uses?
       
      
                
     
    
    
    
    
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Answer:
d
Explanation:
is the because that's the amount of work in making machine can do producing heat 
 
                                
             
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Answer:
What that means please explain 
 
        
                    
             
        
        
        
Sorrry needdddd pointssssss
        
             
        
        
        
Answer:
attached below 
Explanation:
 
        
             
        
        
        
Answer:
like a mountain place thanks #careonlearning