The correct option is D.
Lumen is used to quantify the amount of total light energy that a source is putting out in all direction, thus, it refers to luminous output of a light source. Initial lumen refers to the luminosity of a light when it was first turned on; the luminosity is highest at this point. 
        
                    
             
        
        
        
Answer:
a = F / m
Explanation:
force same -> mass variable
more mass -> less force 
 
 
        
             
        
        
        
To stop instantly, you would need infinite deceleration. This in turn, requires infinite force, as demonstrable with this equation:F=ma<span>So when you hit a wall, you do not instantly stop (e.g. the trunk of the car will still move because the car is getting crushed). In a case of a change in momentum, </span><span><span>m<span>v⃗ </span></span><span>m<span>v→</span></span></span>, we can use the following equation to calculate force:F=p/h<span>However, because the force is nowhere close to infinity, time will never tend to zero either, which means that you cannot come to an instantaneous stop.</span>
        
             
        
        
        
Answer:
A theory changes based on new observations and testing.
Explanation:
A scientific theory is a product of multiple trials and repeated experiments. It usually follows after carefully conducting and testing the validity of the hypothesis. 
A scientific theory provides an explanation into how something behaves. 
A law just states a finding will not explain it. 
Most theories are tenable and can be improved upon when new observations and testing are carried out. 
 
        
             
        
        
        
Answer:
u need to make sure that comparison is = to shapes and then find the shapes sizes and add them