Answer:
i think u times them im not sure but then divide
Explanation:
 
        
                    
             
        
        
        
The answer is 1.52.
N = C (speed of light) / actual speed
n = index of refraction
 
        
                    
             
        
        
        
Answer:
Gravity separation is an industrial method of separating two components, either a suspension, or dry granular mixture where separating the components with gravity is sufficiently practical: i.e. the components of the mixture have different specific materials and Magnetic separations take advantages of natural magnetic properties between minerals in feed. The separation is between economic ore constituents, noneconomic contaminants and gangue. and saw dust can be separated by gravity separation method. The process can be used for separating insoluble substances which are heavier than liquid by allowing them to settle down on their own due to gravity. The mixture of sand and iron can be separated from each other by using a magnet. Iron gets attracted towards a magnet leaving behind the sand.
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If it is not exposed to sunlight often... then it might not be able to produce sufficient amounts