1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

3. Who invented Floppy disk ?

Answer: IBM in 1970

4. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

5. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

6. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

7. Who invented Proton ?

Answer:

Ernest Rutherford