Frequency, f = v / λ
f = 2.998 * 10⁸ / 3.55*10⁻⁸
f = 8.445 * 10¹⁵ Hz.
        
             
        
        
        
Because 
green insinuates a feeling of moving forward and gain confidence and comfort by the color
 
        
                    
             
        
        
        
Well, you could get the mass as 

 ad then 

, where 

 is the sea level weight, 

 the sea level accel., 

 the accel. above while 

 the weight above.
 
        
        
        
Answer:
If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.
 
        
             
        
        
        
When two oxygen atoms get close to each other, the attractions from the nucleus of both atoms attract the outer electrons. 
(BRAINLIEST PLEASE!!!)