{"id":844,"date":"2026-10-25T03:06:27","date_gmt":"2026-10-25T03:06:27","guid":{"rendered":"https:\/\/www.physics.wisc.edu\/lectdemo\/?page_id=844"},"modified":"2026-10-25T03:40:33","modified_gmt":"2026-10-25T03:40:33","slug":"drinking-bird-4c31-30a","status":"publish","type":"page","link":"https:\/\/www.physics.wisc.edu\/lectdemo\/drinking-bird-4c31-30a\/","title":{"rendered":"Drinking Bird, 4C31.30a"},"content":{"rendered":"<h1 style=\"margin-top:var(--wp--preset--spacing--50);margin-bottom:var(--wp--preset--spacing--20)\" class=\"is-style-mini-bar wp-block-post-title\">Drinking Bird, 4C31.30a<\/h1>\n\n\n<p class=\"wp-block-paragraph\"><strong>pira200 Listed<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Location:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cabinet:<\/strong> Thermodynamics Cabinet<\/li>\n\n\n\n<li><strong>Bay:<\/strong> (A2)<\/li>\n\n\n\n<li><strong>Shelf:<\/strong> #5<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/DrinkingBird?action=AttachFile&amp;do=get&amp;target=4C31-30_02i-400.jpg\" alt=\"4C31-30_02i-400.jpg\" title=\"4C31-30_02i-400.jpg\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Description:<\/strong> Also called Dippy Bird or Tippy Bird.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Equipment<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Location<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>ID Number<\/strong><\/td><\/tr><tr><td>Drinking Bird<\/td><td><a href=\"https:\/\/www.physics.wisc.edu\/lectdemo\/thermodynamics-bay-a2\/\" data-type=\"page\" data-id=\"819\">TD, A2, Shelf #5<\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\">4C31.30a<\/td><\/tr><tr><td>150 ml. beaker<\/td><td>Shelf over the sink area 2237<\/td><td class=\"has-text-align-center\" data-align=\"center\">NA<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Setup:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Make sure that the drinking bird is assembled. If not do the following.\n<ul class=\"wp-block-list\">\n<li>&#8211; Insert the Pivot into the openings at the top of the two legs as per the photo above and make the bird move to and fro freely.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Fill a 150 ml. beaker with cold water.<\/li>\n\n\n\n<li>Put the head into the water and make it get wet completely and place the bird near the beaker, then the bird begin drinking water herself. (The more the head wet the fast the bird starts drinking the water.)<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cautions, Warnings, or Safety Concerns:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Do not break the tube( bird body). The red liquid (<a href=\"http:\/\/en.wikipedia.org\/wiki\/Dichloromethane#Toxicity\">dichloromethane or methylene chloride<\/a>) is an acute inhalation hazard and can cause optic neuropathy and hepatitis.<\/li>\n\n\n\n<li>Be sure to keep the bird&#8217;s body dry, otherwise the bird will stop to drink.<\/li>\n\n\n\n<li>Be sure keep the bird&#8217;s in the place where the air ventilating regularly.<\/li>\n\n\n\n<li>If the bird&#8217;s sways backward adjust the metal part straight or haend a little bit forward.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Demonstration:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Put water on the head of bird. When water evaporates, it makes the temperature of the glass head lower. This makes some of the red liquid (dichloromethane or methylene chloride) vapor to condense. From ideal gas law, the pressure in the head of the bird drop due to the lower temperature and condensation.The difference of the pressure between the head and base of the bird causes the red liquid to be pushed up from the base. Then the head of the bird become heavy and tips over. While the bird tips over, it makes air hole that can make red liquid flows back to the bottom bulb and this makes bird go back to its vertical position again. And this will occur periodically until the water on the head of bird dry.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><img decoding=\"async\" alt=\"4C31-30_03i.jpg\" src=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/DrinkingBird?action=AttachFile&amp;do=get&amp;target=4C31-30_03i.jpg\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"2\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"2\"><img decoding=\"async\" alt=\"DrinkingBird-01.gif\" src=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/DrinkingBird?action=AttachFile&amp;do=get&amp;target=DrinkingBird-01.gif\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"2\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"2\">Move: <a href=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/DrinkingBird?action=AttachFile&amp;do=view&amp;target=DrnkingBird.mpg\">DrnkingBird.mpg<\/a><\/td><\/tr><tr><td><img decoding=\"async\" alt=\"4C31-30_04i.jpg\" src=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/DrinkingBird?action=AttachFile&amp;do=get&amp;target=4C31-30_04i.jpg\"><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/DrinkingBird?action=AttachFile&amp;do=view&amp;target=DrnkingBird.mpg\">DrnkingBird.mpg<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>References:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><a href=\"http:\/\/en.wikipedia.org\/wiki\/Drinking_bird\">Wikipedia<\/a><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.physics.wisc.edu\/lectdemo\/change-of-state\/\" data-type=\"page\" data-id=\"849\">Change of State<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/Demonstrations\">Demonstrations<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/wiki.physics.wisc.edu\/facultywiki\/Instructional\">Home<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>pira200 Listed Location: Description: Also called Dippy Bird or Tippy Bird. Equipment Location ID Number Drinking Bird TD, A2, Shelf #5 4C31.30a 150 ml. beaker Shelf over the sink area 2237 NA Setup: Cautions, Warnings, or Safety Concerns: Demonstration: Put water on the head of bird. When water evaporates, it makes the temperature of the &hellip;<\/p>\n","protected":false},"author":19,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uw_migration_status":"in-progress","_uw_gutenberg_post_content_before_migration":"","advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","_uw_seo_meta_title":"","_uw_seo_meta_description":"","_uw_seo_twitter_card_type":"summary_large_image","_uw_seo_meta_image":"","_uw_seo_meta_image_url":"","_uw_seo_meta_image_sizes":[],"_uw_seo_custom_meta_tags":[],"footnotes":""},"class_list":["post-844","page","type-page","status-publish","hentry"],"coauthors":[],"author_meta":{"author_link":"https:\/\/www.physics.wisc.edu\/lectdemo\/author\/srnarfwisc-edu\/","display_name":"srnarf@wisc.edu"},"relative_dates":{"created":"Posted 1 week ago","modified":"Updated 1 week ago"},"absolute_dates":{"created":"Posted on October 25, 2026","modified":"Updated on October 25, 2026"},"absolute_dates_time":{"created":"Posted on October 25, 2026 3:06 am","modified":"Updated on October 25, 2026 3:40 am"},"featured_img_caption":"","featured_img":false,"series_order":"","_links":{"self":[{"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/pages\/844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/comments?post=844"}],"version-history":[{"count":4,"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/pages\/844\/revisions"}],"predecessor-version":[{"id":853,"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/pages\/844\/revisions\/853"}],"wp:attachment":[{"href":"https:\/\/www.physics.wisc.edu\/lectdemo\/wp-json\/wp\/v2\/media?parent=844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}