1. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

2. Who invented Transformer ?

Answer:

Ottó Bláthy

3. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

4. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

5. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.

6. Who invented paper ?

Answer:

Cai Lun

7. Who invented X-ray ?

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