1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

3. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

4. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

5. Who invented Super Computer ?

Answer:

Seymour Cray

6. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

7. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.