1. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

2. Who invented Piano ?

Answer:

Bartolomeo Cristofori

3. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

4. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

5. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

6. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

7. Who invented Helicopter ?

Answer:

Igor Sikorsky