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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'.
give a brief definition of surveying and describe its fundamental purposes
Bituminous Macadam: Bituminous Macadam (BM) is a base course in which coarse aggregates are mixed with a bituminous binder. The mix is open-graded with 20-25 per cent voids.
Question What are thought in determining whether casings have to be left in for mini-piles ? Answer Contrary to most of pile design, design of min-piles is controlled
Your home mortgage is $300,000 for 30 years with a nominal annual rate of 7%. The monthly payment is most nearly: Solution: n = 360 months interest = 7%-annual ÷ 12-months/year
N-type semiconductor is an example of what semiconductor? Answer : N-type semiconductor is an example of extrinsic semiconductor.
state and prove Heisenberg uncertainity principle?
Question If in case mud waves occur during reclamation, what are probable solutions to rectify the situation? Answer (i) Option 1 - Complete Removal of All Disturb
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Q. Minimum and maximum distance between bars? Minimum distance between bars and maximum distance between bars In some codes, a minimum distance amid bars is specified to
Write a program called, A1Q1, that reads a single letter. It will then display the corresponding ASCII code of the letter and prints the next character and the character which is
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