Addition of 2vector gives you 1large vector quantity
        
                    
             
        
        
        
Explanation:
(4566 m / 4 min) × (1 km / 1000 m) × (60 min / h) = 68.49 km/h
 
        
             
        
        
        
A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.
        
             
        
        
        
Answer:
<h2>inertia of motion </h2>
Explanation:
.... ...
 
        
             
        
        
        
Answer:
7 meters, 2.8 meters
Explanation:
work done (nm) = force (n) * distance (m)
140= 20 * m
140/20 = m
m=7 meters
140= 50 * m
140/50 = m
m= 2.8 meters