You can use map and notice one thinh. If you flipp over the edges of continents and put them together, you will get a big single continent that is called pangaea. Practically it's impossible but it could be imagined.
        
                    
             
        
        
        
(b) Always act on the different bodies in opposite directions
 
        
                    
             
        
        
        
Explanation:
Displacement is the straight line distance from the starting position to the final position.
Person X walks halfway around circle.  So her displacement is 100 m.
Person Y walks 3/4 of the way around.  So his displacement is 50√2 m ≈ 70.7 m.
Person Z walks completely around the circle, so their displacement is 0 m.
Therefore:
Z < Y < X
 
        
             
        
        
        
Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.