While standing on railway platform and heating the whistle of an engine coming towards us , we hear the sound increasing; bit when the engine is receding from us it appears to fall why ?

1 Answers  

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How many elements have been discovered on the Periodic Table?

10 Answers   ESRI,

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If Concentrated HCl... Already 37%... So, How to prepare 10% HCl from Conc. HCl (37%)?

7 Answers   Manish Pharma, MOL, S S Pharmachem,

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How is electricity generated from water ?

7 Answers  

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In winter, on a cold morning, the cement feels colder to the foot than a carpet. Why ?

1 Answers  

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Distinguish between lime water and milk of lime ?

1 Answers   Brilliant,

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Why does a white paper appear white, when light is not to fall on it ?

1 Answers  

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What is the unit of conductance?

0 Answers  

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Explain the Charle?s law ?

3 Answers  

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How is brass solution prepared?

0 Answers  

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Which is the hardest substances know ?

3 Answers  

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Why a hot day in Calcutta causes more discomfort than are equally hot day in Delhi ?

1 Answers  

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