Choose the most appropriate answer:Natural radioactivity was discovered by
Natural radioactivity was discovered by Henri Bacquerel.
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What is the SI unit of electric current?
Which of the following does computing in a personal computer?
_____ is the source of energy and materials in human beings.
In terms of size, Mars ranks no. ___ in our Solar System.
The laws which govern the motion of planets are called ___________________.
The side mirrors of vehicles are of which type of mirrors?
Isolines joining places of equal rainfall are called ___________
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