It is usually accepted that Mesopotamia is the earliest knows civilization.
The Sumers were the first empire in the history, in Mesopotamia, but there was a civilization in Mesopotamia before them.
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Porosity is a cavity-like discontinuity and occurs due to the entrapment of gases in the molten weld pool. These entrapped gases don't get a chance to escape from the molten weld pool and hence cause porosity.
<h3>Which discontinuities are caused during welding?</h3>
Weld discontinuities can be defined as "an interruption of the typical structure of a weld, such as a lack of homogeneity in the mechanical, metallurgical or physical characteristics of the weld." Porosity is considered to be the most critical discontinuity. Weld discontinuities include porosity, incomplete fusion, excessive melt.
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Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.
Answer:
add more points and A is the answer 2020 edg.
Explanation:
The theory of the Divine Right of Kings<span> aimed at instilling obedience by explaining why all social ranks were religiously and morally obliged to obey their government</span>
