The kinetic energy that occurs when your hands are rubing together
        
                    
             
        
        
        
Wait and be patience for the medication, it could take some more time in certain cases
        
             
        
        
        
B) wavelength
Notice how Z goes from one wave's crest (top) to another's crest. Wavelength can also be measured from a wave's trough (bottom) to the next one's trough.