Answer:21
Explanation:every body said 
 
        
             
        
        
        
Answer:
elastic force and weight are related to the acceleration of the System.
Explanation:
The relationship between these two forces can be found with Newton's second law.
          - W = m a
 - W = m a
         K x - m g = m a
We see that elastic force and weight are related to the acceleration of the System.
If a harmonic movement is desired, an extra force that increases the elastic force is applied, but to begin the movement this force is eliminated, in general , if the relationship between this external and elastic force is desired, the only requirement is that it be small for harmonic movement to occur
 
        
             
        
        
        
Peer review is important because it is used by scientists to decided which results should be published in a scientific journal
        
                    
             
        
        
        
Light travels at the speed of 186,000 miles per second. If you were to travel around the earth it would be 7.5 times in a second