1. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

2. Who invented Automatic rifle ?

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

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

5. Who invented Calculus ?

Answer: Newton of Britain in 1670.

6. Who invented Super Computer ?

Answer:

Seymour Cray

7. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698