Most ebook files are in PDF format, so you can easily read them using various software such as Foxit Reader or directly on the Google Chrome browser.
Some ebook files are released by publishers in other formats such as .awz, .mobi, .epub, .fb2, etc. You may need to install specific software to read these formats on mobile/PC, such as Calibre.
Please read the tutorial at this link: https://ebookbell.com/faq
We offer FREE conversion to the popular formats you request; however, this may take some time. Therefore, right after payment, please email us, and we will try to provide the service as quickly as possible.
For some exceptional file formats or broken links (if any), please refrain from opening any disputes. Instead, email us first, and we will try to assist within a maximum of 6 hours.
EbookBell Team
0.0
0 reviewsStephanie Louise Kwolek is an American chemist who invented poly-paraphenylene terephtalamide—better known as Kevlar. She was born in the Pittsburgh suburb of New Kensington, Pennsylvania. In 1964, in anticipation of a gasoline shortage, her group began searching for a lightweight yet strong fiber to be used in tires. The polymers she had been working with at the time formed liquid crystal while in solution, something unique to those polymers at the time. However, Kwolek persuaded technician Charles Smullen to test her solution. She was amazed to find that the new fiber would not break when nylon typically would.