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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 entropy microscopically
A pelton wheel works at the foot of a dam because of which the head available at the nozzle is 400m. The nozzle diameter is 160mm and the coefficient of velocity is 0.98. The diame
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Determine the shape of the beam: A simply supported beam of span l carries a concentrated load P at midspan. If the beam is to be a beam of consistent strength, determine the
Q . Determine MI of unequal angle section 15cm × 10cm × 1.5cm with longer leg vertical and is flange upwards. Figure Sol. : A 1 = 10 ×
Find out also the loss of energy through impact: Example 1. A bullet weighing 0.1 newton horizontally fired with a velocity of 80 metres/sec hits a wooden block, weighin
Ask quesinstantaneous stress formulation #Minimum 100 words accepted#
Solving example by this method
What are the limitations with rectangular combined footings? In this section the analysis is limited to the determination of plan dimensions of the footing. The physical dimens
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