Are there answers choice or a picture I can see?
        
             
        
        
        
Answer:
I believe the correct answer would be A :)
Explanation:
 
        
             
        
        
        
Answer:
b. negative
Explanation:
neutrons have a negative charge and protons have a proton has a positive charge 
 
        
                    
             
        
        
        
Answer:
Option D) 4A
Explanation:
As the cycle of the wave passes by, the amplitude gives the longest journey when the spot travels from the undistributed position. During each cycle the spot travels "Four times" .
Considering one of this cycle, if it begins to travel from it's undistributed position , there would be four movements i.e 
* Upward movement through distance A
*Downward movement through distance A
*Downward again through distance A
*Upward through distance A.
Then it would travel back to its undistributed position held
 
        
             
        
        
        
Answer:
6J
Explanation:
Given parameters: 
 Mass of fish  = 1kg 
Velocity  = 12m/s 
Unknown: 
Change in kinetic energy = ? 
Solution:
Kinetic energy is the energy due to the motion of a body. It is mathematically given as: 
        K.E  =  m v²
  m v²  
Now, insert the parameters and solve; 
   K.E  =   x 1 x 12  = 6J
  x 1 x 12  = 6J
The change in kinetic energy is 6J