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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'.
1(a)Explain the difference between a concurrent and a non concurrent force system . (b)If a non coplanar force system is acted upon by equal and opposite forces,it must be in equil
Define and explain Mohr’s theorem for finding slope and deflection.
list the properties of aggregates
(a) Distinguish among Black cotton soil and Laterite from an engineering point of view. (b) Explain the terms 'Void ratio', 'Degree of saturation' and 'Water content', define th
Define the Precedence Diagramming Methods a) Activity on Node (AON) with arrows for dependencies b) Uses all forms of precedence relationships
Explain the Underwater Problems and Material Defects? The major bridge construction materials are steel and concrete. In the past, stone and brick masonry, with lime mortar as
compare 2 numbers and print either the message identifying the greater than number(or) the message starting that both number are equal
short note
Determine the stresses set up in the brass: A compound bar is constructed from three bars 50 mm wide by 12 mm thick fastened together to form a bar 50 mm wide by 36 mm thick.
Compare the probabilities: Use the central limit theorem to compute P (¦ X - μ ¦ ≥ k), k = 1, 2,3,4,5 where X and μ are as defined in Example. Compare the probabilities with t
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