Chlorine pls mark as brianliest
        
             
        
        
        
I think its C or D.
Einstein's Nobel winning photoelectric equation.
The higher the work function, the more energy needed to photoeject an electron from the surfface
Try D
 
        
             
        
        
        
Answer:
B. Direction
Explanation:
Speed is a scalar quantity and doesn't keep track of direction : Velocity is a vector quantity and is direction aware. 
 
        
             
        
        
        
Answer:
A- Martin brings his friends home to meet grandpa.
Explanation:
took the test.
 
        
                    
             
        
        
        
<span>The answer would be convection currents. Convection happens when atoms with a lot of heat energy in a liquid or gas transfer and get the room of particles with fewer heat energy. Heat energy is transported from hot places to cooler places by convection.</span>