Paragraph writing : Topic -Strike the iron while it is hot.
Answers
Answer: hope this answer will help you
Explanation:
Ironing is the use of a machine, usually a heated tool (an iron), to remove wrinkles from fabric.[1] The heating is commonly done to a temperature of 180–220 °Celsius (356-428 Fahrenheit), depending on the fabric.[2] Ironing works by loosening the bonds between the long-chain polymer molecules in the fibers of the material. While the molecules are hot, the fibers are straightened by the weight of the iron, and they hold their new shape as they cool. Some fabrics, such as cotton, require the addition of water to loosen the intermolecular bonds. Many modern fabrics (developed in or after the mid-twentieth century) are advertised as needing little or no ironing. Permanent press clothing was developed to reduce the ironing necessary by combining wrinkle-resistant polyester with cotton.
The first known use of heated metal to "iron" clothes is known to have occurred in China.[3] The electric iron was invented in 1882, by Henry W. Seeley. Seeley patented his "electric flatiron" on June 6, 1882 (U.S. Patent no. 259,054).[4]
Answer:
Subsequent to the use of bronze and copper, man learned how to use Iron. It was probably in 4000 B.C. that the first objects made with iron appeared in the Middle East. The first people learnt how to hammer iron into various shapes, it was much later that they discovered that iron could be heated and hammered into various shapes much more easily. It was around 1500 B.C. that people learned how to extract iron from heated iron ore and then hammer it into the required shapes. The Celts of Europe were the first to use these techniques.
Some of the earlier implements and tools made in this manner included razor or saw blades, knives, tongs etc. The furnaces in which the ore was melted were shallow hearths made of stone. These hearths were filled with iron ore and charcoal. The charcoal was set on fire and bellows were used to raise the temperatures. Once the iron ore was hot enough, it collected at the bottom while the impurities floated at the top.
These techniques used by the Celts slowly became popular and around 1000 B.C. spread to the other parts of Europe. Around 400 B.C. this technique of making things out of iron spread to other parts of the world including China. The Chinese contributed to the development by making powerful bellows which allowed the temperatures to be raised much higher thus producing iron of a better quality. Parallel to these developments, iron was also used in a similar manner in Egypt. Evidence of this is found in the form of tools and weapons in various tombs of the Egyptian rulers of that period. The early Assyrians also knew how to make weapons and coats of mail made out of iron. The advent of the Iron age was probably the most significant phase of human development. Subsequently the advent of the Industrial revolution further advanced the use of iron in various forms which continues even today.
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September 28, 2017 evirtualguru_ajaygourParagraph WritingNo Comment General Knowledge, Paragraph Writing, Science Facts, Short Paragraph
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