Its physical weathering and physical weathering can be sometimes called mechanical weathering it includes the processes which break rocks apart changing their chemical composition.
        
             
        
        
        
Answer:
As point B is located inside the copper block so net electric field at point B is j.
Explanation:
Consider the figure attached below. The net electric field at location B,that is inside the copper block is zero because when a conductor is charged or placed in an electric field of  external charges, net charge lies on the surface of conductor and there is no electric field inside the conductor. As point B is located inside the copper block so net electric field at point B is zero as well direction of net electric field at point B is zero.
 
        
             
        
        
        
Answer:
Basketball 
Explanation:
Basketball was invented to keep athletes warm in the winter.
 
        
                    
             
        
        
        
A hole, and people die if they fall in there.