Manners are commonly accepted social behavior. Manners tell you what is polite to do, and what is not. Mind you, what is considered manners in one country, may be rude in another. For example, it is rude in Japan to finish your meal completely, because your host may think that if you've eaten everything on your plate, you may still be hungry.
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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Answer:
a system of ideas and ideals
Explanation: