1. Who invented Helicopter ?

Answer:

Igor Sikorsky

2. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

3. Who invented Proton ?

Answer:

Ernest Rutherford

4. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

5. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

6. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

7. Who invented c language

Answer:

Dennis Ritchie