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      <description>Como é que é possível ouvires?</description>
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      <pubDate>2018-02-18 22:11:03 UTC</pubDate>
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         <description><![CDATA[<div>Explica o fenómeno representado na imagem empregando as palavras: emissor; recetor; comunicação; cordel; copos; ouvido; vibração; propagação; fonte sonora; som.</div>]]></description>
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         <title>O que acontece nesta experiência?</title>
         <author>ceu_dias</author>
         <link>https://padlet.com/ceu_dias/v7tez5fsxg5m/wish/232763566</link>
         <description><![CDATA[<div>(vídeo idêntico em <a href="https://www.youtube.com/watch?v=ZAusL0292vc">https://www.youtube.com/watch?v=ZAusL0292vc</a>)</div>]]></description>
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         <pubDate>2018-02-18 22:29:27 UTC</pubDate>
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         <title>Como se propaga o som</title>
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         <title>Quantas vezes vibram as hastes do diapasão em cada segundo</title>
         <author>ceu_dias</author>
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         <title>O que concluis desta experiência?</title>
         <author>ceu_dias</author>
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         <pubDate>2018-02-18 22:56:21 UTC</pubDate>
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         <author>ceu_dias</author>
         <link>https://padlet.com/ceu_dias/v7tez5fsxg5m/wish/232768464</link>
         <description><![CDATA[<div>Explica o som como uma onda de pressão. Utiliza os termos zonas de rafefação e de compressão.</div>]]></description>
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         <pubDate>2018-02-18 23:08:40 UTC</pubDate>
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