Over the course of October at London Heathrow Airport, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 54 minutes, implying an average daily decrease of 3 minutes, 48 seconds, and weekly decrease of 26 minutes, 35 seconds.
Polyester is a synthetic fiber derived from coal, air, water, and petroleum. Developed in a 20th-century laboratory, polyester fibers are formed from a chemical reaction between an acid and alcohol.
3. Synthetic polymers A variety of synthetic polymers as plastic (polythene), synthetic fibres(nylon 6,6) and synthetic rubbers (Buna-S) are examples of man-made polymers extensively used in daily life as well as in industry.There are three different types based on the structure of the polymers.. Synthetic polymers A variety of synthetic polymers as plastic (polythene), synthetic fibres(nylon 6,6) and synthetic rubbers (Buna-S) are examples of man-made polymers extensively used in daily life as well as in industry.There are three different types based on the structure of the polymers.