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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They traded with them selves.
Their civilization has never paused, or changed. They still have their old cultures (sort of) They still have the same language.
Explanation:
On March 5, 1770 the dreadful day came. A mob of people went in front of the Customs Office in Boston Massachusetts and started to throw stuff and give insults at the soldiers. As a result to this so-called harassment the soldiers fired on the crowd. The first to die was an African-Amercan man named Crispus Attucks.
Cognitive restructuring is one of the best techniques for modifying irrational and/or distorted thinking. True. Hence, the correct answer is True. Read below about cognitive restructuring.
<h3>What is cognitive restructuring?</h3>
Cognitive restructuring is one of the best means for modifying irrational and/or distorted thinking. Mental toughness is an undoubted belief in one's ability to achieve one's goals.
Therefore, the correct answer is as given above
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The complete question goes thus:
Cognitive restructuring is one of the best techniques for modifying irrational and/or distorted thinking. T/F
Answer:
Overmier and Seligman have described the phenomenon of learned <u>helplessness</u> as the tendency to feel powerless in the face of events that we can't control.
In 1967, Overmier and Seligman conducted a research, which showed that dogs, once found in an uncontrollable situation such as unavoidable electric shocks, were incapable of escaping a different situation, although there was a possible escape in that situation. The phenomenon of learned helplessness is also commonly experienced by humans who, after repeatedly going through a stressful situation, believe they do not have control over the events. They fail to take any action, even if there is a possible solution.
