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Vibrations cause sounds yet if you move your hand back and forth through the air, you don't hear a sound. why?
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6. an article, which costs rs. 850 is sold at a profit of 6%.what is the selling price ? -a) rs.900 b) rs. 901 c) rs. 890 d) rs. 905
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James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. why did he expect a difference
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Vibrations cause sounds yet if you move your hand back and forth through the air, you don't hear a s...
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