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An elastomer is a polymeric substance obtained after vulcanization of rubber. Vulcanization is the process of improving the properties of rubber by heating with sulphur. A normal rubber is not useable as it becomes brittle at low temperature and sticky at high temperature. Charles Goodyear had been trying to 'cure' the rubber so that it could be used in all seasons. He tried to mix all kinds of things such as ink, black pepper, cheese and what not. But he couldn't succeed until he dropped a piece of rubber on stove accidentally.
To his surprise, he found that instead of melting the rubber piece hardened and remained pliable. It was found in the lab that it contained traces of sulphur. Goodyear perfected the process and named it 'vulcanization' after the Roman God of fire, 'Vulcan'.
A vehicle for landing on the moon has a mass of 4500kg. The damped spring undercarriage system of the vehicle has a stiffness of 450kn/m and a damping ratio of 0.2. The rocket lift
Examine the state of stress at the junction of flange: A beam of I-section as shown in Figure (a) is subjected to a bending moment of 84.928 kN m and a shear force of 106.1 kN
im newer to the courses so i would like to know about the assignment types. in this case can u please show me a sample assignment?
hi sir. i hope every thing is fine with you. I want to have an information about the way how to compute stream flow from the rainfall over the catchment and anso need the way how t
Define Diving Equipments for Underwater Inspection of Bridge? Generally two types of diving, Scuba diving and surface supplied air diving, is employed in underwater inspection
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Define Abrasion of steel structures? Abrasion of steel structures can generally be recognised by a worn, smooth, polished appearance of the surface. Abrasion is caused by cont
Q. Defaults for precast concrete pipes made by spinning? Small diameter precast concrete pipes are generally manufactured by spinning method. The spinning method fundamentally
what is plastic?its types and composition and its uses as engineering material
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