Answer:
Resistance is a measure of the opposition to the flow of current in an electrical circuit. 
Explanation:
It is symbolized by the Greek letter omega (Ω), resistance is measured in ohms.  
If an electric current of one ampere passes through a component across which a potential difference (voltage) of one volt exists, then the resistance of that component is one ohm
 
        
             
        
        
        
Answer:
A. The path of least resistance.
Explanation:
ur welcome again ;)
 
        
             
        
        
        
It often requires STANDARD reaction time
 
        
                    
             
        
        
        
You could answer this right away IF you knew the length of each wave, right ?
Well,  Wavelength = (speed) / (frequency).
Speed = 3 x 10⁸ m/s  (the speed of light)
and
Frequency = 90.9 x 10⁶ Hertz.
So the length of each wave is  3 x 10⁸ / 90.9 x 10⁶  meters.
To answer the question, see how many pieces you have to cut 
that 1.5 km into, in order for each piece to be 1 wavelength. 
It'll be
(1,500 meters) divided by (3 x 10⁸ meters/sec) / (90.9 x 10⁶ Hz)
To divide by a fraction, flip the fraction and then multiply:
(1500 meters) times (90.9 x 10⁶ Hz)/(3 x 10⁸ meters/sec)
=   454.5