1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

3. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

6. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

7. Who invented Hydrogen bomb ?

Answer:

Edward Teller