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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'.
write a c program to calculate the included angles for given fore bearing and back bearing.
a clear illustration about working to part principle and some examples
terms of least cost method
what are the advantages of grillage foundation and why people prefers that?
battened system with end tie plate
Define Major Ions present in the water Cations: Calcium, Magnesium, sodium, potassium Anions: Bicorabonate, sulfate, chloride Other ions present: Iron. Manganese, Fluor
Define the pre-tensioned concrete construction We understand that in the pre-tensioned concrete construction, stretched tendons are provided in the concrete moulds at the time
Determine the latitude and departure of each side of the closed traverse ABCDA. Total the latitudes and departures. TIP: For Closed Traverse, Sum of Latitudes is Z
Q. What is objective method of assessment? Track recording consists of objective method of assessment of the quality of track with the help of sophisticated equipments. A conti
concert
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