1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

3. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

4. Who invented Submarine ?

Answer:

John Philip Holland

5. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

6. Who invented Atomic Bomb ?

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

7. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644