1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Floppy disk ?

Answer: IBM in 1970

3. Who invented Computer ?

Answer:

Charles Babbage

4. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

5. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

6. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

7. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.