1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented Helicopter ?

Answer:

Igor Sikorsky

3. Who invented Submarine ?

Answer:

John Philip Holland

4. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

5. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

6. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

7. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.