1. Who invented Submarine ?

Answer:

John Philip Holland

2. Who invented X-ray ?

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

3. Who invented Nylon ?

Answer:

Wallace Carothers

4. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

5. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

6. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

7. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm