Which of the following inventions was not powered by electricity?
       
      
                
     
    
    
    
    
    2 answers:
            
              
              
                
                
Answer:
The internal combustion engine.
Explanation:
it was powered by by externally-produced steam.
 
                                
             
                    
              
              
                
                
I believe it would be the Internal Combustion Engine, since it was powered by a hydrogen and oxygen mixture.
                                
             
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Answer:
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