1. Who invented Calculus ?

Answer: Newton of Britain in 1670.

2. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

3. Who invented Computer ?

Answer:

Charles Babbage

4. Who invented Atomic Bomb ?

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

5. Who invented Vitamin K ?

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

6. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

7. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798