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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.
Question: As shown in the figure, the jet transport B is flying north with a velocity V B = 600 Km/h when a smaller aircraft A passes underneath the transport headed in the 60
Q. Define Oxidation Process? Oxidation is defined as a loss of electrons, as when a metal goes from the metallic state to the corroded state. When a metal reacts with oxygen,
What is the chief advantage of CIDR over the original classful addressing scheme? CIDR stands for Classless Inter-Domain Routing is a new addressing scheme for the Internet, th
General Construction Procedure Well foundations may be constructed in slipways on barges, or on sand islands. The ones constructed in slipways are launched and towed to their
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a) A carbide tool with mild steel work piece was found to give life of 2hours while cutting at 50 mpm. Calculate the tool life if the same tool is used at a speed 25% higher than p
full defination
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(a) At a point in a material under stress, the resultant intensity of stress across a certain plan is 100 N/mm 2 (compressive) inclined at 30 o to its normal. On another plane th
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