1. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

2. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895

3. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

4. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

5. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

6. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

7. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849