1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented c language

Answer:

Dennis Ritchie

3. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

4. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

5. Who invented Nylon ?

Answer:

Wallace Carothers

6. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

7. Who invented Transformer ?

Answer:

Ottó Bláthy