1. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

2. Who invented Submarine ?

Answer:

John Philip Holland

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 Nylon ?

Answer:

Wallace Carothers

6. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

7. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902