1. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

2. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

3. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.

4. Who invented X-ray ?

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

5. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

6. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

7. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765