1. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

2. Who invented Automatic rifle ?

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

3. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented Computer ?

Answer:

Charles Babbage

6. Who invented Hydrogen bomb ?

Answer:

Edward Teller

7. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683