1. Who invented Nylon ?

Answer:

Wallace Carothers

2. Who invented DNA Structure ?

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

3. Who invented Submarine ?

Answer:

John Philip Holland

4. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

5. Who invented Floppy disk ?

Answer: IBM in 1970

6. Who invented Laser ?

Answer:

Charles H. Townes

7. Who invented Stethoscope ?

Answer: Laennec of French in 1819.