a stone is dropped from the edge of a roof (i) how long does it take to fall 4.9m (ii) how fast does it move at the end of that fall (iii) How fast does it move at the end of 7.9m (iv) what is its acceleration after 1s and 2s ?
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the product of the greatest and the smallest three-digit , number formed by the digit 0,9 and 6 is?
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Thunderstorm, a violent short-lived weather disturbance that is almost always associated with lightning, thunder, dense clouds, heavy rain or hail, and strong gusty winds. ... Thunderstorms arise when layers of warm, moist air rise in a large, swift updraft to cooler regions of the atmosphere.
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