Post-and-lintel system
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Post-and-lintel system, in building construction, a system in which two upright members, the posts, hold up a third member, the lintel, laid horizontally across their top surfaces. All structural openings have evolved from this system, which is seen in pure form only in colonnades and in framed structures, because the posts of doors, windows, ceilings, and roofs normally form part of the wall.
 
        
             
        
        
        
Yes it would be okay. You are only using it for 2 things. Not everything.
 
        
                    
             
        
        
        
Answer:
Here is the formula you will need to follow in order t get your answer.
Explanation:
Hope this helped you!
 
        
             
        
        
        
D is the correct answer.
In the badly drawn diagram attached, you will find the <em>yellow</em> represents wavelength, which is the distance between identical points on consecutive waves.
The <em>green</em> represents the amplitude, which is the distance between the origin (middle) and crest/trough (top/bottom)