1. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

2. Who invented Java Language ?

Answer:

James Gosling

3. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

4. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

5. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

6. Who invented Printing Press ?

Answer:

Johannes Gutenberg

7. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683