{"id":117355,"date":"2015-08-21T02:00:00","date_gmt":"2015-08-20T23:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=2afd68391787f11e058a7ad6370d6640"},"modified":"2015-08-21T02:00:00","modified_gmt":"2015-08-20T23:00:00","slug":"measuring-youngs-modulus-the-easy-way-and-tracing-the-effects-of-measurement-uncertainties","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=117355","title":{"rendered":"Measuring Young\u2019s modulus the easy way, and tracing the effects of measurement uncertainties"},"content":{"rendered":"<p>The speed of sound in a solid is determined by the density and elasticity of the material. Young\u2019s<br \/>\nmodulus can therefore be calculated once the density and the speed of sound in the solid are<br \/>\nmeasured. The density can be measured relatively easily, and the speed of sound through a rod can be<br \/>\nmeasured very inexpensively by setting up a longitudinal standing wave and using a microphone to<br \/>\nrecord its frequency. This is a simplified version of a technique called \u2018impulse excitation\u2019. It is<br \/>\na good educational technique for school pupils. This paper includes the description and the free<br \/>\nprovision of custom software to calculate the frequency spectrum of a recorded sound so that the<br \/>\nresonant peaks can be readily identified. Discussion on the effect of measurement uncertainties is<br \/>\nincluded to help the more thorough experimental student improve the accuracy of his method. The<br \/>\ntechnique is sensitive enough to be able to detect changes in the elasticity modulus with a<br \/>\ntemperature change of &#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The speed of sound in a solid is determined by the density and elasticity of the material. Young\u2019s<br \/>\nmodulus can therefore be calculated once the density and the speed of sound in the solid are<br \/>\nmeasured. The density can be measured relatively easily,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-117355","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/117355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=117355"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/117355\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=117355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=117355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=117355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}