most of a atoms mass is in the nucleus of the atom:) hope this helps you
 
        
                    
             
        
        
        
It is during that full moon and the new moon.
        
                    
             
        
        
        
Answer: 0.04metres
Explanation:
The wavelength of a wave is the distance covered by the wave after one complete cycle. It is measured in metres, and represented by the symbol λ
Recall that Velocity (V) = Frequency F x wavelength λ
V = F λ
Make λ the subject formula 
λ = V / F
In this case Frequency = 0.4 kHz 
Convert kilohertz to hertz by multiplying 0.4 by 1000 i.e (0.4 x 1000Hz) = 400Hz
Velocity of wave = 16 m/s
So, λ = V / F
λ = 16 m/s / 400Hz
λ = 0.04metres
Thus, the wavelength of a wave is 0.04metres
 
        
                    
             
        
        
        
The frontal lobe takes about 1/3 of the cerebral cortex.