1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented Calculus ?

Answer: Newton of Britain in 1670.

3. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

4. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

5. Who invented Piano ?

Answer:

Bartolomeo Cristofori

6. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

7. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland