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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 sign of uniform density weighs 270 lb and is supported by a ball-andsocket joint at A and by two cables. Determine the tension in each cable and the reaction at A.
how to prove that work done is a path function
what is the meant by kleins construction?
Lead Acid Battery : The lead acid type of battery is generally used in all types of two wheelers. It consists of six cells and the rating of the battery is 12 V-2.5 Ah and 12 V-5
Find out the centre of gravity of a right circular cone: Find out the centre of gravity of a right circular cone of height H & the base radius a. Solution Refer to Fig
how it works
Diffrence between external diameter and internal diameter: A compound tube is built by shrinking one tube on another, the ultimate dimension being, 80 mm internal diameter, 16
A converging elbow (see Figure 4) turns water through an angle of 135 o in a vertical plane. The flow cross-section diameter is 400 mm at the elbow inlet, section (1), and 200 mm
Discover the suitable diameter of the shaft: A shaft is required to fail while the torque on the shaft is 20 kN-m. Discover the suitable diameter of the shaft of the modulus o
HOW TO CALCULATE OUTPUT TORQUE OF HELICAL GEAR BOX
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