1. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

2. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

3. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented Vitamin D ?

Answer:

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

6. Who invented Nylon ?

Answer:

Wallace Carothers

7. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712