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Physical World ...

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  • Question 1
    1 / -0

    Which scientist does not belong to Germany?

  • Question 2
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    Who discovered radioactivity?

  • Question 3
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    Which is the strongest fundamental force of nature?

  • Question 4
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    Which force operates among the heavier elementary particles?

  • Question 5
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    Electromagnetic force is stronger than gravitational force by a factor of:

  • Question 6
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    Who discovered ultra-short radio waves?

  • Question 7
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    The wave nature of electrons is used in which of the following devices?

  • Question 8
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    According to Einstein’s theory, mass and energy are related as:

  • Question 9
    1 / -0

    On which laws, is the principle of rocket propulsion based?

  • Question 10
    1 / -0

    The phenomenon of Photoelectric effect is used in:

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