History, asked by VanjaraTanvi, 7 months ago

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Answered by chiarg7
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Answered by harshalananwatkar
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the chinies astronomers ,mathmatician and seismologiest Zhang Huieng(78-139) ad described the earliest seismoscope known in about (132 ad . arriving shock waves displace the pendelum linked to the mechanism which opens the jaw of the dragon facing the direction of the earthquake . A ball falls from the dragons teeth into mouth of the toad below to record the event.

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