Easily distracted
Courageous
Different
Half-god
Troublemaker
        
                    
             
        
        
        
The author Mary Shelley use the word chimerical in that line because she said that the powers of Cornelius Agrippa were improbable and because she wanted to say this in a fancy way. 
Hope this Helps :)
BTW, Mary Shelley is the author of Frankenstein <span />
        
                    
             
        
        
        
The correct answer to "Nine out of ten Americans already file their taxes on the Internet. What are you waiting for?" is: 
It is a type of Bandwagon fallacy.
The bandwagon fallacy is a fallacy based on the statement that the opinion of the majority is always valid, as if everybody does it, you should do it too. 
Comes from latin<em> Argumentum ad populum </em>which literally means "appeal to the people".