{"id":216,"date":"2024-04-18T22:26:16","date_gmt":"2024-04-18T22:26:16","guid":{"rendered":"https:\/\/quickening.zapto.org\/wordpress\/?p=216"},"modified":"2024-04-30T21:03:10","modified_gmt":"2024-04-30T21:03:10","slug":"total-eclipse-physics","status":"publish","type":"post","link":"https:\/\/quickening.zapto.org\/wordpress\/?p=216","title":{"rendered":"Total Eclipse Physics"},"content":{"rendered":"\n<p>I tried to test the &#8220;<a rel=\"noreferrer noopener\" href=\"https:\/\/en.wikipedia.org\/wiki\/Allais_effect\" target=\"_blank\">Allais Effect<\/a>&#8221; during the Total Eclipse. In 1954, the economist Maurice Allais saw the precession of a pendulum reverse during a total eclipse.  Subsequent experiments during other total eclipses mostly failed to replicate the result. I suspended a 30 lb dumbbell from a 13&#8242; line. I used a red laser pointing parallel to the line and videoed where it crossed a ruler. It is difficult enough to see precession in an un-powered pendulum, but the weight will always sway back and forth around the plane of motion too.  The video was 7 minutes: 2 minutes before and after the total eclipse, and 3&#8217;15&#8221; during totality. I captured the frame where the laser dot crosses into the ruler and turned the frames into a short video <a rel=\"noreferrer noopener\" href=\"https:\/\/quickening.zapto.org\/Eclipse.mp4\" target=\"_blank\">here<\/a>. Notice right in the middle of the 9 second video, the swaying seems to be interrupted.  Two weeks later I duplicated the test without an eclipse and the swaying and precession was entirely regular and predictable.  <\/p>\n\n\n\n<p>I also built a slinky balance. The weight at the end of a suspended slinky was attached to a fixed lever with a red laser pointer pointing about 6&#8242; away. I recorded a displacement when the moon and sun were overhead during the total eclipse. To quantify the displacement, I could add a sq. cm of paper to the weight amounting to about 1\/1000th of the weight and that displacement was about 5 times the eclipse displacement.  <\/p>\n\n\n\n<p>The relative forces due to gravity between the Earth, Moon, and Sun are easy to calculate.  The pull upward from the moon overhead is about  1\/300,000th of Earth&#8217;s pull downward. The additional pull from the Sun is even less: 1\/1,600,000th. There is no way this change in gravitational forces could account for the displacement I observed.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I tried to test the &#8220;Allais Effect&#8221; during the Total Eclipse. In 1954, the economist Maurice Allais saw the precession of a pendulum reverse during a total eclipse. Subsequent experiments during other total eclipses mostly failed to replicate the result. I suspended a 30 lb dumbbell from a 13&#8242; line. I used a red laser [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/216"}],"collection":[{"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=216"}],"version-history":[{"count":5,"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/216\/revisions"}],"predecessor-version":[{"id":225,"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/216\/revisions\/225"}],"wp:attachment":[{"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quickening.zapto.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}