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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.
(a) Compare otto, Diesel and Dual combustion cycle on the basis of compression ratio, same compression ration and same Heat input and constant maximum pressure and heat supplied.
String Vibration Fixed Ends In case of the vibrations of a string, both its ends at x = 0 and x = L may be permanently fixed; y (x = 0) = 0 , and y (x = L) = 0 at all t
Determine the tension in the cord: Two blocks containing the weights and positions illustrated in Figure rest on a frame which rotates around its vertical axis at a constant s
Construct of a diagonal scale: During construct of a diagonal scale of RF = 1/48, displaying yards, inches and feet to represent a maximum length of 7 yards. Scratch a distanc
what is lotus effect
what is the relation ship between tolrancr grade and manufacturing process ?
this is a problem for designing wrecking crane. there are 2 scenarios, one is when ball is held and one where its at maximum. i calculated the loads and now need to find the follow
First Gear Position : When gear M1 is in mesh with gear C1 then this is first gear drive position. The gear C1 is freely attached to counter shaft, so gear C1 itself cannot rotate
calculate the head required
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