Everyday Science
Which element is used as moderator in nuclear reactor?
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Which of the following rays are more penetrating?
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Sun revolves around the Milky Way in about _____ million years.
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Sun is divided into ______ main layers.
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The sun contains _______ % mass of the solar system?
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Sun is moving around the centre of the galaxy at a velocity of _______ km/s?
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The horizontal rows of the periodic table are called ______?
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Battery was invented by__________?
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A loudspeaker changes _________ energy into sound energy.
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