1. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

2. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

3. Who invented Printing Press ?

Answer:

Johannes Gutenberg

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

6. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

7. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932