1. Who invented Submarine ?

Answer:

John Philip Holland

2. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

3. Who invented Piano ?

Answer:

Bartolomeo Cristofori

4. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

5. Who invented Television ?

Answer:

John Logie Baird

6. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

7. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765