1. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

2. Who invented Nylon ?

Answer:

Wallace Carothers

3. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

6. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

7. Who invented Piano ?

Answer:

Bartolomeo Cristofori