On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
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Suitable impurities are added to a semiconductor depending on its use. This is done in order to |
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Stars twinkle because |
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It takes much longer to cook food in the hills than in the plains, because |
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Moment of inertia is |
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Of the following natural phenomena, tell which one known in Sanskrit as deers thirst? |
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Inside an aeroplane, flying at a high altitude, |
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Sound travels with a different speed in media. In what order does the velocity of sound increase in these media? |
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One thousand microns is equal to |
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Sound travels at the fastest speed in |
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oil raise up the wick in a lamp. The principle involves |
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