Answer:
150 years i guess so? im nkt sure
 
        
                    
             
        
        
        
I might not be right but I think the empirical formula is NO2
 
        
             
        
        
        
Answer:
When two forces are the same strength but act in opposite direction, they are called balanced forces. Again, tug-of-war is a perfect example. If the people on each side of the rope are pulling with the same strength, but in the opposite direction, the forces are balanced. The result is no motion.
Explanation:
Hope this helps!
 
        
                    
             
        
        
        
They all have something to do with electricity
        
             
        
        
        
Different Fossil organisms succeed one another to go up through the different rock layers in a definite and determinable order. Therefore, any time period can be recognized by its fossil content
Explanation:
Different Fossil organisms succeed one another to go up through the different rock layers in a definite and determinable order. Therefore, any time period can be recognized by its fossil content