1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

3. Who invented Piano ?

Answer:

Bartolomeo Cristofori

4. Who invented HIV ?

Answer:

5. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

6. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

7. Who invented colour television ?

Answer:

Peter Carl Goldmark