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Which scientist does not belong to Germany?
Who discovered radioactivity?
Which is the strongest fundamental force of nature?
Which force operates among the heavier elementary particles?
Electromagnetic force is stronger than gravitational force by a factor of:
Who discovered ultra-short radio waves?
The wave nature of electrons is used in which of the following devices?
According to Einstein’s theory, mass and energy are related as:
On which laws, is the principle of rocket propulsion based?
The phenomenon of Photoelectric effect is used in:
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