 
			 
			MCQOPTIONS
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				| 1. | Elastic strain energy per unit volume or strain energy density is NOT equal to ________Where x=stress in x direction, x=strain in x direction, E=young s modulus, P=load, =elongation. | 
| A. | ( frac{1}{2}( sigma x epsilon x) ) | 
| B. | ( frac{1}{E}( sigma x^2) ) | 
| C. | ( frac{1}{2}(E epsilon x^2) ) | 
| D. | ( frac{1}{2}(p Delta) ) | 
| Answer» E. | |