1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

3. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

4. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

5. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

6. Who invented Calculus ?

Answer: Newton of Britain in 1670.

7. Who invented Vitamin D ?

Answer:

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