1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Radiocarbon ?

Answer:

Willard Libby

3. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

4. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

5. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

6. Who invented Floppy disk ?

Answer: IBM in 1970

7. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.