When two objects collide is the answer...Hope this helps :)
        
                    
             
        
        
        
The answer is c. velocity
        
             
        
        
        
The object in the lower orbit will move faster in its orbit, and will have a shorter orbital period. None of that depends on their masses either.
        
             
        
        
        
Initially they are connected in parallel, so they have the same voltage V=120 V at their ends. Therefore we can use Ohm's law to calculate the resistance of each appliance:


When they are connected in series, they are crossed by the same current I. The equivalent resistance of the circuit in this case is 

, so we can use Ohm's law for the entire circuit to find the current in the circuit:
 
 
        
        
        
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