1. Who invented Radiocarbon ?

Answer:

Willard Libby

2. Who invented Floppy disk ?

Answer: IBM in 1970

3. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

4. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

5. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

6. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

7. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.