1. Who invented Calculus ?

Answer: Newton of Britain in 1670.

2. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

3. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.

4. Who invented Nylon ?

Answer:

Wallace Carothers

5. Who invented Hydrogen bomb ?

Answer:

Edward Teller

6. Who invented Television ?

Answer:

John Logie Baird

7. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805