The object that goes through chemical change, changes completely to where you can not change it back to its original form. Physical change you can undo
        
             
        
        
        
Answer:
Explanation:
I think the answer is statement no 3.
Hope it helps.
 
        
                    
             
        
        
        
La D mijo es blanco por que al pasar con rapides el color se torna blanco
        
                    
             
        
        
        
 All spontaneous processes release free energy
        
             
        
        
        
Answer:
case x py   L is in the positive z direction
 case y px   L the negative z direction
 
Explanation:
The angular amount is defined by the relation
          L = r x p
the bold are vectors, where r is the position vector and p is the linear amount vector.
The module of this vector can be concentrated by the relation
          L = r p sin θ
the direction of the vector L can be found by the right-hand rule where the thumb points in the direction of the displacement vector, the fingers extended in the direction of the moment p which is the same direction of speed and the palm points in the direction of the angular momentum L
in the case x py
the thumb is in the x direction, the fingers are extended in the direction and the palm is in the positive z direction
In the case y px
the thumb is in the y direction, the fingers are in the x direction, the palm is in the negative z direction