It is either A or C.  i hope i could help. if not im really sorry
        
                    
             
        
        
        
Answer:
Twice
Explanation:
From the formula for velocity in a circle
V= 2πr/T 
Where V is velocity
 r is raduis 
 T is period
We see that as r increases V increases so if r is doubled V becomes doubled
 
        
             
        
        
        
The answer is false , because they move without an electromagnetic 
 
        
                    
             
        
        
        
Answer: F = ma,
Explanation:
 the most famous equation in physics, establishing an equivalence between energy and mass. But is this the most important equation in physics? Knowledgeable scientists will tell you no. The most important equation in physics is F = ma, also known as Newton's second law of mechanics.
 
        
             
        
        
        
A. it bends when light reaches an end of a barrier it will bend.