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      <title>Vibrations and Sound by Mr Downes&#39; Padlets</title>
      <link>https://padlet.com/rdownes/p17</link>
      <description>Chapter 17 </description>
      <language>en-us</language>
      <pubDate>2018-11-29 21:48:17 UTC</pubDate>
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      <webMaster>hello@padlet.com</webMaster>
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         <author>rdownes</author>
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         <description><![CDATA[]]></description>
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         <pubDate>2018-11-26 05:03:25 UTC</pubDate>
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         <title></title>
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         <pubDate>2018-11-29 22:05:12 UTC</pubDate>
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         <title>Reading HW Week1 Friday 30th November</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/309579143</link>
         <description><![CDATA[<div>Ignore Young modulus and Bulk modulus parts</div>]]></description>
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         <pubDate>2018-11-29 22:09:23 UTC</pubDate>
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         <author>rdownes</author>
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         <pubDate>2018-11-30 07:57:42 UTC</pubDate>
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         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/309665466</link>
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         <pubDate>2018-11-30 08:01:54 UTC</pubDate>
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         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/309666949</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-11-30 08:09:30 UTC</pubDate>
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         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/309669277</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://docs.google.com/presentation/d/13E0cJjR1IssDSfSzyIBynjIx38WAofIZNrxLn_4bNr8/edit?usp=sharing" />
         <pubDate>2018-11-30 08:19:36 UTC</pubDate>
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      <item>
         <title>Trivial</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/309669339</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-11-30 08:19:55 UTC</pubDate>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/309814245</link>
         <description><![CDATA[]]></description>
         <enclosure url="http://www.schoolphysics.co.uk/age11-14/Sound/text/Refraction_of_sound/index.html" />
         <pubDate>2018-11-30 15:24:12 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/309814245</guid>
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      <item>
         <title>6th Year HW-Section A Q1-Q26</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/309985811</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-11-30 21:10:36 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/309985811</guid>
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         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310005241</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-11-30 22:44:38 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310005241</guid>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310037269</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://oceanservice.noaa.gov/facts/sonar.html" />
         <pubDate>2018-12-01 08:13:43 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310037269</guid>
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         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310037293</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-12-01 08:14:08 UTC</pubDate>
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         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310037306</link>
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         <pubDate>2018-12-01 08:14:23 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310037306</guid>
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      <item>
         <title>Important: A mistake was made in class. Open pipes and stretched strings allow all harmonics while for half-open pipe only odd ones can be formed.</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310043127</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-12-01 09:43:17 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310043127</guid>
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      <item>
         <title>Physics Plus Sound Chapter</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310054969</link>
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         <pubDate>2018-12-01 12:39:24 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310054969</guid>
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      <item>
         <title>Play by clicking bottom right square (with arrow) and video will launch in vimeo website. Supports learning in Chap 16/17 of real world physics.</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310134064</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://vimeo.com/84972606" />
         <pubDate>2018-12-02 08:35:35 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310134064</guid>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310135160</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-12-02 08:53:30 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310135160</guid>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310173232</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/257332247/cfb91b1186f3a1ccb7910a692d1cca4a/Molecule4__1_.gif" />
         <pubDate>2018-12-02 15:39:56 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310173232</guid>
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      <item>
         <title>Stretched string or closed pipe</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310173394</link>
         <description><![CDATA[<div>3rd overtone or fourth harmonic</div>]]></description>
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         <pubDate>2018-12-02 15:41:35 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310173394</guid>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310190944</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-12-02 17:32:51 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310190944</guid>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310254309</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/257332247/93e518147935c4f8f950dcce8bf5af5c/ph_pr_soundexperiments.pdf" />
         <pubDate>2018-12-03 01:35:53 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310254309</guid>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310255404</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://docs.google.com/spreadsheets/d/1qY9dYXheMcAxOweFu82Hx8PgrH8NU_0bgSaTntYIIgo/edit?usp=sharing" />
         <pubDate>2018-12-03 01:44:05 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310255404</guid>
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      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310257133</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/257332247/a54791c49fdf63ad0e199ba31fad8e85/6Waves_Module___Sound_Waves.pptx" />
         <pubDate>2018-12-03 01:58:50 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310257133</guid>
      </item>
      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310261351</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://docs.google.com/presentation/d/1UZrgHBlJddWG6sZieeYab7RE8ccfO7r2g0sZp2dOthg/edit?usp=sharing" />
         <pubDate>2018-12-03 02:31:25 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310261351</guid>
      </item>
      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/310262226</link>
         <description><![CDATA[]]></description>
         <enclosure url="http://hyperphysics.phy-astr.gsu.edu/hbase/Music/otone.html" />
         <pubDate>2018-12-03 02:39:31 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/310262226</guid>
      </item>
      <item>
         <title></title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/316693500</link>
         <description><![CDATA[<div>Physics Site Links<br>Physics Home (p)<br><a href="https://padlet.com/rdownes/p">https://padlet.com/rdownes/p</a><br>Physics 6th year (py6)<br><a href="https://padlet.com/rdownes/py6">https://padlet.com/rdownes/py6</a><br>Physics 5th year (py5)<br><a href="https://padlet.com/rdownes/py5">https://padlet.com/rdownes/py5</a><br>Physics transition year (py4)<br><a href="https://padlet.com/rdownes/py4">https://padlet.com/rdownes/py4</a><br>Physics Books (pb)<br><a href="https://padlet.com/rdownes/pb">https://padlet.com/rdownes/pb</a><br>Physics Experiments (pe)<br><a href="https://padlet.com/rdownes/pe">https://padlet.com/rdownes/pe</a><br>Physics Tests -by topic (pt) <br><a href="https://padlet.com/rdownes/pt">https://padlet.com/rdownes/pt</a><br>Physics Papers (pp)<br><a href="https://padlet.com/rdownes/pp">https://padlet.com/rdownes/pp</a><br>Physics Marking -schemes (pm)<br><a href="https://padlet.com/rdownes/pm">https://padlet.com/rdownes/pm</a><br>Physics Websites (pw)<br><a href="https://padlet.com/rdownes/pw">https://padlet.com/rdownes/pw</a><br>Physics Slideshows (ps)<br><a href="https://padlet.com/rdownes/ps">https://padlet.com/rdownes/ps</a><br>Physics Videos (pv)<br><a href="https://padlet.com/rdownes/pv">https://padlet.com/rdownes/pv</a><br>Real World Physics chapter by chapter<br><a href="https://padlet.com/rdownes/p1">https://padlet.com/rdownes/p1</a><br><a href="https://padlet.com/rdownes/p2">https://padlet.com/rdownes/p2</a><br><a href="https://padlet.com/rdownes/p3">https://padlet.com/rdownes/p3</a><br><a href="https://padlet.com/rdownes/p4">https://padlet.com/rdownes/p4</a><br><a href="https://padlet.com/rdownes/p5">https://padlet.com/rdownes/p5</a><br><a href="https://padlet.com/rdownes/p6">https://padlet.com/rdownes/p6</a><br><a href="https://padlet.com/rdownes/p7">https://padlet.com/rdownes/p7</a><br><a href="https://padlet.com/rdownes/p8">https://padlet.com/rdownes/p8</a><br><a href="https://padlet.com/rdownes/p9">https://padlet.com/rdownes/p9</a><br><a href="https://padlet.com/rdownes/p10">https://padlet.com/rdownes/p10</a><br><a href="https://padlet.com/rdownes/p11">https://padlet.com/rdownes/p11</a><br><a href="https://padlet.com/rdownes/p12">https://padlet.com/rdownes/p12</a><br><a href="https://padlet.com/rdownes/p13">https://padlet.com/rdownes/p13</a><br><a href="https://padlet.com/rdownes/p14">https://padlet.com/rdownes/p14</a><br><a href="https://padlet.com/rdownes/p15">https://padlet.com/rdownes/p15</a><br><a href="https://padlet.com/rdownes/p16">https://padlet.com/rdownes/p16</a><br><a href="https://padlet.com/rdownes/p17">https://padlet.com/rdownes/p17</a><br><a href="https://padlet.com/rdownes/p18">https://padlet.com/rdownes/p18</a><br><a href="https://padlet.com/rdownes/p19">https://padlet.com/rdownes/p19</a><br><a href="https://padlet.com/rdownes/p20">https://padlet.com/rdownes/p20</a><br><a href="https://padlet.com/rdownes/p21">https://padlet.com/rdownes/p21</a><br><a href="https://padlet.com/rdownes/p22">https://padlet.com/rdownes/p22</a><br><a href="https://padlet.com/rdownes/p23">https://padlet.com/rdownes/p23</a><br><a href="https://padlet.com/rdownes/p24">https://padlet.com/rdownes/p24</a><br><a href="https://padlet.com/rdownes/p25">https://padlet.com/rdownes/p25</a><br><a href="https://padlet.com/rdownes/p26">https://padlet.com/rdownes/p26</a><br><a href="https://padlet.com/rdownes/p27">https://padlet.com/rdownes/p27</a><br><a href="https://padlet.com/rdownes/p28">https://padlet.com/rdownes/p28</a><br><a href="https://padlet.com/rdownes/p29">https://padlet.com/rdownes/p29</a><br><a href="https://padlet.com/rdownes/p30">https://padlet.com/rdownes/p30</a><br><a href="https://padlet.com/rdownes/p31">https://padlet.com/rdownes/p31</a><br><a href="https://padlet.com/rdownes/p32">https://padlet.com/rdownes/p32</a><br><a href="https://padlet.com/rdownes/p33">https://padlet.com/rdownes/p33</a><br><a href="https://padlet.com/rdownes/p00">https://padlet.com/rdownes/p00</a><br>Experiments: One by one<br>Mechanics Experiments<br><a href="https://padlet.com/rdownes/pm1">https://padlet.com/rdownes/pm1</a><br><a href="https://padlet.com/rdownes/pm2">https://padlet.com/rdownes/pm2</a><br><a href="https://padlet.com/rdownes/pm3">https://padlet.com/rdownes/pm3</a><br><a href="https://padlet.com/rdownes/pm4">https://padlet.com/rdownes/pm4</a><br><a href="https://padlet.com/rdownes/pm5">https://padlet.com/rdownes/pm5</a><br><a href="https://padlet.com/rdownes/pm6">https://padlet.com/rdownes/pm6</a><br><a href="https://padlet.com/rdownes/pm7">https://padlet.com/rdownes/pm7</a><br><a href="https://padlet.com/rdownes/pm8">https://padlet.com/rdownes/pm8</a><br>Sound Experiments<br><a href="https://padlet.com/rdownes/ps1">https://padlet.com/rdownes/ps1</a><br><a href="https://padlet.com/rdownes/ps2">https://padlet.com/rdownes/ps2</a><br><a href="https://padlet.com/rdownes/ps3">https://padlet.com/rdownes/ps3</a><br>Heat Experiments<br><a href="https://padlet.com/rdownes/ph1">https://padlet.com/rdownes/ph1</a><br><a href="https://padlet.com/rdownes/ph2">https://padlet.com/rdownes/ph2</a><br><a href="https://padlet.com/rdownes/ph3">https://padlet.com/rdownes/ph3</a><br><a href="https://padlet.com/rdownes/ph4">https://padlet.com/rdownes/ph4</a><br>Light Experiments<br><a href="https://padlet.com/rdownes/pl1">https://padlet.com/rdownes/pl1</a><br><a href="https://padlet.com/rdownes/pl2">https://padlet.com/rdownes/pl2</a><br><a href="https://padlet.com/rdownes/pl3">https://padlet.com/rdownes/pl3</a><br><a href="https://padlet.com/rdownes/pl4">https://padlet.com/rdownes/pl4</a><br><a href="https://padlet.com/rdownes/pl5">https://padlet.com/rdownes/pl5</a><br><a href="https://padlet.com/rdownes/pl6">https://padlet.com/rdownes/pl6</a><br>Electricity Experiments<br><a href="https://padlet.com/rdownes/pe1">https://padlet.com/rdownes/pe1</a><br><a href="https://padlet.com/rdownes/pe2">https://padlet.com/rdownes/pe2</a><br><a href="https://padlet.com/rdownes/pe3">https://padlet.com/rdownes/pe3</a><br><a href="https://padlet.com/rdownes/pe4">https://padlet.com/rdownes/pe4</a><br><a href="https://padlet.com/rdownes/pe5">https://padlet.com/rdownes/pe5</a><br><a href="https://padlet.com/rdownes/pe6">https://padlet.com/rdownes/pe6</a><br><a href="https://padlet.com/rdownes/pe7">https://padlet.com/rdownes/pe7</a><br><a href="https://padlet.com/rdownes/pe8">https://padlet.com/rdownes/pe8</a></div>]]></description>
         <enclosure url="" />
         <pubDate>2018-12-26 17:27:28 UTC</pubDate>
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      <item>
         <title>Notes</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/316820676</link>
         <description><![CDATA[<div>Sound waves in a tube are guided acoustic waves and are 1d waves.<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2018-12-29 02:34:24 UTC</pubDate>
         <guid>https://padlet.com/rdownes/p17/wish/316820676</guid>
      </item>
      <item>
         <title>Speed guns use Doppler radar to perform speed measurements.</title>
         <author>rdownes</author>
         <link>https://padlet.com/rdownes/p17/wish/316840132</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://en.wikipedia.org/wiki/Radar_gun" />
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