1. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

2. Who invented paper ?

Answer:

Cai Lun

3. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

4. Who invented google ?

Answer:

Larry Page

5. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

6. Who invented Vitamin A ?

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

7. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948