This indicates that the reaction is exothermic meaning that it releases heat/energy
        
                    
             
        
        
        
Answer:
becuase of the sun
in different places some places would be cold
 
        
             
        
        
        
Answer:
toilet seat and washing of hands ✋ very well
 
        
             
        
        
        
<span>The addition of a catalyst to a chemical reaction provides an alternate pathway that c</span>atalysts lowers the activation energy.
        
                    
             
        
        
        
Wave speed = frequency x wavelength 
                     =   100 x 0.3
                     =       30 m/s.
Hope this helps!