1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Nylon ?

Answer:

Wallace Carothers

3. Who invented DNA Structure ?

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

4. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

5. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805