{"id":82151,"date":"2026-01-02T08:00:32","date_gmt":"2026-01-02T08:00:32","guid":{"rendered":"https:\/\/arhs.vip\/?p=82151"},"modified":"2026-02-03T20:49:20","modified_gmt":"2026-02-03T20:49:20","slug":"longitudinal-waves-sound-notes-2025","status":"publish","type":"post","link":"https:\/\/arhs.vip\/?p=82151","title":{"rendered":"Longitudinal Waves &amp; Sound Notes 2026"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p><span style=\"text-decoration: underline\">Notes:<\/span><br \/>\n\n<p>&nbsp;<\/p>\n<p><span style=\"text-decoration: underline\">Video on the Effect of Helium &amp; Sulphur Hexafluoride on the Speed of Sound:<\/span><\/p>\n<p><iframe loading=\"lazy\" title=\"Speak Like Darth Vader with Sulfur Hexafluoride\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/A7XdOyZIkko?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Notes: &nbsp; Video on the Effect of Helium &amp; Sulphur Hexafluoride on the Speed of Sound: &nbsp; &nbsp; &nbsp;<\/p>\n","protected":false},"author":135,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"arc_restricted_post":false,"footnotes":""},"categories":[48],"tags":[],"class_list":["post-82151","post","type-post","status-publish","format-standard","hentry","category-grade-10-physical-sciences"],"_links":{"self":[{"href":"https:\/\/arhs.vip\/index.php?rest_route=\/wp\/v2\/posts\/82151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arhs.vip\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arhs.vip\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arhs.vip\/index.php?rest_route=\/wp\/v2\/users\/135"}],"replies":[{"embeddable":true,"href":"https:\/\/arhs.vip\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=82151"}],"version-history":[{"count":6,"href":"https:\/\/arhs.vip\/index.php?rest_route=\/wp\/v2\/posts\/82151\/revisions"}],"predecessor-version":[{"id":84267,"href":"https:\/\/arhs.vip\/index.php?rest_route=\/wp\/v2\/posts\/82151\/revisions\/84267"}],"wp:attachment":[{"href":"https:\/\/arhs.vip\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=82151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arhs.vip\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=82151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arhs.vip\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=82151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}