4 Answers
            
            
        
        change in lengh divide by original lengh
                        The unit of strain is the amount of stress or deformation a material experiences per unit area. The unit of strain is usually measured in Newtons per square metre (N/m2).
                        my friend strain has no  unit since it is ratio
                mahadsanid qaabka quruxda badan aa halkaan su'aalaha ugu daabacday waxaa Rajenaya ina so gudbisid su'aalo laga wada faa'ido sido kake su'aalaha aan jawaabta laheyn in aad ka jawaabi kartid 
NB: 1-ha sameen su'aalo horay ujiray ( duplicate) 2- suaalkasta aad so gudbisid ka Dhig mid laga jawaabi karo ama adiga aad ku dartid jawaabta
salaan ka timid maamulka! nasiib wacan
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