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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'.
friction circle method of stability of slope
compare 2 numbers and print either the message identifying the greater than number(or) the message starting that both number are equal
Explain briefly physical classifications of stone
Steps to determine the hydraulic horsepower (whp) for pump problems: 1) Determine (h A ) by rearranging the Bernoulli equation. 2) Apply (h A ) into the equation found i
Q. How to determine the frequency of flood? Flood frequency may be estimated preferably from flood records, if available, for a number of years or they may be based on rainfall
Define Rotation - Actions in POT Bearings? POT bearings are associated with large rotations which are accommodated by the deformation of elastomeric pad. Large cyclic rotations
Lock Entrance: Wet docks have lock entrances to overcome the high fluctuations in water level in the sea. Figure 7 gives a layout of a lock entrance. It consists of a lock cha
What is the Loss of Prestress due to Shrinkage of Concrete It is the loss of prestress due to shrinkage of concrete, which takes place in the initial stage of hardening of conc
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Explain the Installation of Shock Transmission Unit? It is not always necessary to install STUs while a structure is under construction but the holding down anchor bolts and th
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