1. Who invented Hydrogen bomb ?

Answer:

Edward Teller

2. Who invented Java Language ?

Answer:

James Gosling

3. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

4. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

5. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

6. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

7. Who invented Safety razor ?

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