A direct current 
this is a current that only flows in one direction
        
             
        
        
        
Answer:
B.
Explanation:
The batteries make it so the chemical energy is being passed into the flashlight allowing it to work as designed forming light. 
 
        
             
        
        
        
Well, it happens a few weeks ahead, then for a total of 3 hours and 40 minutes.
        
             
        
        
        
Answer:
D lower energy waves is most likely the safest if one is exposed to.
 
        
             
        
        
        
10.67m/s²
32N
Explanation:
Given parameters: 
Mass of the body = 3kg 
velocity of the mass = 4m/s 
radius of circle = 0.75m 
Unknown: 
centripetal acceleration = ? 
centripetal force = ? 
Solution: 
The centripetal force is the force that keeps a radial body in its circular motion. It is directed inward: 
    Centripetal acceleration  = 
    v is the velocity of the body
     r is the radius of the circle 
   putting in the parameters: 
    Centripetal acceleration = 
     Centripetal acceleration = 10.67m/s²
 Centripetal force = m   
 
           m is the mass 
  Centripetal force = mass x centripetal acceleration
                               = 3 x 10.67
                               = 32N 
learn more: 
Acceleration brainly.com/question/3820012
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