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when rubber is moulded in die and kept for heat after few min the die is removed from heat... the ruber reduces its size compare to original size of die ... its called srinkage of rubber... this srinkage in rubber have different percentage of srinkage in different types of rubber....
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How many rubbers are made every year?
Over 300 billion rubber products are manufactured worldwide every year.
What evidence physical and religious would prove a relationship between the Mayas and other cultures from other places?
Until the early 1900's, the Maya civilization was considered to be the parent culture in Mesoamerica from which all other societies sprouted. There have been many Mayan sculptures and carvings found in the region, so all other carvings were also considered to be that of the Maya. One difference in the carving is that some carvings of large heads had faces with more African looking features than many of the other Mayan works. There was also evidence of a half-jaguar half-man beast, which also did not fit in with other Mayan finds. It wasn't until 1929, when Marshall H Saville, the Director of the Museum of American Indian in New York, classified these new works as an entirely new culture not of Mayan heritage. He named this culture Olmec, which means the "rubber people" in Nahuatl, the language of the Mexica ("Aztec") people. It was the Aztec name for the people who lived in this area at the much later time of Aztec dominance. Ancient Mesoamericans, spanning from ancient Olmecs to Aztecs, extracted latex from Castilla elastica, a type of rubber tree in the area. The juice of a local vine, Ipomoea alba, was then mixed with this latex to create rubber as early as 1600 BC. It is not known what name the ancient Olmec used for themselves. Later Mesoamerican accounts seem to refer to the ancient Olmec as "Tamoanchan".
What causes for airplanes to crash?
There are many different reasons why airplanes crash. The two main ones are of course during take off and landing. For the most part take offs are relativity easy and safe. There are a number of things that can go wrong of course. A couple of examples would be rubber malfunction, or failure for the yoke to lift, and possibly a sudden burst from on engine or turbine. Landing, being slightly more dangerous also has its risks. The plane can pitch downward from a sudden gust of wind, the landing gear could fail or the ailerons could tip the plane on its side. While in the air its even harder to bring down a plane. Turbulence is experienced in practically every flight, if the winds are strong enough the plane can pitch over and crash or in extreme circumstances break the wings or tail. Lighting also hits planes frequently usually with little effect. Most lightning strikes are absorbed by the plane and the instruments in the plane might malfunction slightly. Still, the lightning could short circuit the engines or props and light them on fire bringing the plane down. There are many things that cause airplane crashes but they rarely happen and airplanes are still a very safe way of travel for anyone.
How calculate Shrinkage percentage of rubber?
how to calculating of shrinkage a rubber parts
What are the disadvantages of rubber?
When rubber is heated it expands, and when it is cooled is contracts- depending on what it is used for it could be an advantage.
What factors contribute to the shrinkage of rubber?
Several factors contribute to the shrinkage of rubber, including exposure to heat, sunlight, and certain chemicals. Additionally, mechanical stress and aging can also cause rubber to shrink over time.
Why does cold shrink rubber?
Cold causes rubber to shrink due to the reduction in molecular motion. At lower temperatures, the polymer chains in rubber become less flexible and more tightly packed, leading to a decrease in volume. This phenomenon is a physical property of rubber materials, which can expand when warmed and contract when cooled. Therefore, exposure to cold environments results in the observable shrinkage of rubber.
Does rubber shrink when heated?
Yes, rubber typically shrinks when heated because the heat causes the rubber molecules to contract and become more tightly packed together.
What are the disadvantages of rubber tires?
When rubber is heated it expands and when it cools it contracts.
Does cold shrink rubber?
Yes, although sometimes not noticeably enough to notice. Different types of rubber would experience different shrinkage rates.
What are the materials used to make a bouncy ball?
Bouncy balls are typically made from rubber or plastic materials. These materials are heated and molded into a spherical shape, then cooled to create the bouncy ball. Some bouncy balls may also contain additives to enhance their bounce and durability.
What happens to a rubber wheel when its heated?
When a rubber wheel is heated, it becomes softer and more flexible due to the increased temperature causing the rubber molecules to vibrate more. This can lead to the rubber wheel losing its shape or integrity, and potentially becoming deformed or damaged if exposed to excessive heat.
Rubber and glass which become softer as they are heated are examples of?
Rubber and glass which become softer as they are heated are examples of crystalline solids
What element is heated with rubber to make it vulcanized?
Sulfur is the element that is heated with rubber to make it vulcanized. Vulcanization is a chemical process that involves adding sulfur to rubber and then heating it to improve its strength, elasticity, and durability.
What causes rubber to shrink?
Rubber can shrink due to exposure to heat, solvents, or prolonged tension. Heat can break down the polymers in the rubber, causing it to contract. Solvents can dissolve components of the rubber, leading to shrinkage. Tension can alter the molecular structure of the rubber, causing it to compact.
