Answer:
both kinetic and potential energy
Explanation:
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The kinetic energy K given to the helium nucleus is equal to its potential energy, which is 

where q=2e is the charge of the helium nucleus, and 

 is the potential difference applied to it.
Since we know the kinetic energy, we have

and from this we can find the potential difference:
 
 
        
        
        
The weight is the force experienced, whereas the mass represents the actual quantity of matter inside a body.. 
weigh on the surface of the earth is equal to mg
mass is m
and at the centre weight is 0 due to 0 acceleration that's 0 g 
but mass is always constant and remains m, no matter where you are
        
             
        
        
        
Answer:
compressions; rarefactions
Explanation:
 
        
             
        
        
        
Answer:
Dont know if this is right but i say C
Explanation: