1. Who invented Helicopter ?

Answer:

Igor Sikorsky

2. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

3. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

4. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

5. Who invented c language

Answer:

Dennis Ritchie

6. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

7. Who invented Submarine ?

Answer:

John Philip Holland