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Stress necessary to cause a non proportional or permanent extension equal to a defined percentage of gauge length is called as (ECET 2014) a) Rupture stress b) proof stress c) Working stress d) Allowable stress |
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Answer» orophyll MOLECULE CONSISTS of a central magnesium atom surrounded by a nitrogen-containing structure called a porphyrin ring; attached to the ring is a long carbon–hydrogen SIDE chain, known as a PHYTOL chain. |
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