D 
Is the answer because of the ratio of you fart and the smell in ur nose
        
             
        
        
        
The formula of work is Work (Joules)=Force (Newtons) · distance in the direction of the force (meters), therefore its just a matter of replacing factors. 
Work done = 12 · 4.5= 54 joules
 
        
             
        
        
        
Answer:
reaction B is the best one I would choose
 
        
             
        
        
        
Answer:
Well they help us understand the properties of matter of course!
 
        
                    
             
        
        
        
The question is cut off in the picture