1. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

2. Who invented Hydrogen bomb ?

Answer:

Edward Teller

3. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

4. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

5. Who invented Radiocarbon ?

Answer:

Willard Libby

6. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

7. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698