1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

5. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

6. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

7. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932