1. Who invented Radiocarbon ?

Answer:

Willard Libby

2. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

3. Who invented Printing Press ?

Answer:

Johannes Gutenberg

4. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

5. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

6. Who invented X-ray ?

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

7. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888