1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

3. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

4. Who invented Calculus ?

Answer: Newton of Britain in 1670.

5. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

6. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

7. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.