1. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

2. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

3. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

4. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

5. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

6. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

7. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798