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Q. What do you mean by Thermosetting plastics?
This plastic undergoes a number of chemical changes on heating and cure to infusible and practically insoluble articles. The chemical change is not reversible thermosetting plastics do not soften on reheating and can not be reworked. They rather become harder due to completion of any left-over polymerization reaction. Eventually, at high temperatures, the useful properties of the plastic get destroyed. This is called degradation. The commonest thermosetting plastics are: alkyds, epoxides, polyesters, phenolics and urea.
What is the initial velocity of the ball: A ball is horizontally thrown from the top of a building 60 m height, hits the horizontal ground 25 m from the base of the building a
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The transmission output shaft for a heavy goods vehicle can withstand a safe working shear stress of 54MPa. Its outside diameter is 54mm and its internal diameter is 48mm. Calculat
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Polygon law of forces
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Effect of curing conditions on strength, porosity, absorptivity, and shrinkage of concrete in hot and dry climate Abstract This term paper will study the effect of the wet a
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