1 well.. the light when in a far distance seems to fade 
2 because if the primary colors are mixed (2) they make a new secondary
color
Have a wonderful day
        
                    
             
        
        
        
The one that's completely submerged is displacing more water, so the buoyant force on it is greater.
        
             
        
        
        
We know that the Delta E + W(Work done by non-conservative
forces) = 0 (change of energy)
In here, the non-conservative force is the friction force
where f = uN (u =kinetic friction coefficient) 
W= f x d = uNd ; N=mg 
Delta E = 1/2 mV^2 -1/2mVi^2 
umgd + 1/2mV^2 - 1/2mVi^2 = 0 (cancel out the m term) 
This will then give us: 
1/2Vi^2-ugd = 1/2V^2 
V^2 = Vi^2 - 2ugd
So plugging in our values, will give us:
V= Sqrt (5.6^2 -2.3^2)
=sqrt (26.07)
= 5.11 m/s 
 
 
        
             
        
        
        
False. They are arranged in a structure called a crystal lattice