Circuit Soldering Assignment Essay Example | Topics and Well Written Essays - 500 words

Circuit Soldering Assignment - Essay Example It normally commences melting at 183 degree centigrade. Plastic solder differs subject to the proportion of tin and lead. Exhaust fan aids in preventing an individual from inhaling the solder fumes in the soldering station. Safety goggles prevents flying solders from entering the eyes of the person undertaking soldering process whilst clips aids in holding the work piece being join (Jepson, Tyler & Gregory, pp. 178-198). Moistening action is the flush action of solder, which normally develops intermetallic connection amidst the sections. It occurs when hot solder encounters with the copper surface forming a metal solvent action thereby making the solder to dissolves and infiltrates the prevailing copper surface. This makes the molecules of solder and copper to blend thus forming a new alloy with one part copper and the other solder (Jepson, Tyler & Gregory, pp. 167-189). The process solely occurs when the superficial of copper does not have impurity and corresponding oxide film. Suitable solder links is accomplished with cleaned surfaces with solvents before soldering process. Fluxes are utilized in overcoming oxide film on electronic and it mainly entail normal or synthetic rosins and chemical additives. A flux removes oxide during the soldering operation via flux action, which is extremely corrosive at the solder melt temperatures (Jepson, Tyler & Gregory, pp. 167-189). Melt temperature is normally responsible for the flux’s capability to rapidly removal of oxides. Nevertheless, in its underlying unheated state, rosin flux is normally in the non-corrosive and non-conductive thus does not affect circuitry. Moreover, fluxing action aids in removal of oxide, prevention of reformation of the new oxides thus allowing the solder to form the preferred intermetallic

Write a 2-page analysis of a possibe psychological analysis of the Essay

Write a 2-page analysis of a possibe psychological analysis of the Boston Marathon bomber recently charged with multiple counts of murder - Essay Example Testimony by a social worker indicated that the two boys before the police shot the older brother had been attending meetings and relying on a supportive network of friends that were immigrants to do away with the loneliness that they felt for lack of a family themselves. The fact that they were doing so while they had each other is indication enough that the boy is not a criminal mastermind but was clearly undergoing psychological problems at the time. The criminal mind would have been instigate by his brother who was into criminal activities and hence may have influenced him into engaging in the activities as a way to act out his anger and frustration at all the happy people while deep down he suffered from being alone and the loss of a dear brother whom had been looking up for him and at him since the parents left without a backwards glance towards their children or even reaching out to them (Cullen 98). The combination of the loss and grief from the death of the brother who was his guardian and best friend, the frustration by the parents divorcing and leaving to go to another country without their children, the loneliness and the fact that no one seemed to care about him or his situation not even the government drove him towards the edge of the behavior. The only way the brother had taught him to release his anger and frustration was by engaging in crime and this is what he did when he bombed the Boston Marathon. The fact that the bombing was carried out by pressure cooker that was released is a clear indication that the boy was not a terrorist as he lacked the sophisticated bombings or even a clearly made and elaborate escape plan. He was simply just acting out of the moment. I am sure that he had not even thought about committing the heinous act before and it was purely a spur of the moment probably triggered by the happy faces of people all around without a care in the world about