The time described above is known as the waves Period.
The time which it takes for a particle to complete one full cycle is known as the period. Period is normally measured in seconds. Frequency on the other hand is the number of cycles which are completed in a given period of time e.g a second. periodic time T is given by reciprocal of frequency (1/f).
        
             
        
        
        
During the daytime, I have mostly line symmetry.
During the night, I often have almost spherical symmetry.
        
                    
             
        
        
        
Answer:
yes
Explanation:
masses attract each other
with a teeny-tiny force
 
        
             
        
        
        
in english please 
i don't understand actually