{"id":1996,"date":"2009-08-07T01:55:54","date_gmt":"2009-08-07T09:55:54","guid":{"rendered":"http:\/\/www.oeconomist.com\/blogs\/daniel\/?p=1996"},"modified":"2009-08-07T02:50:06","modified_gmt":"2009-08-07T10:50:06","slug":"ball-parking","status":"publish","type":"post","link":"https:\/\/www.oeconomist.com\/blogs\/daniel\/?p=1996","title":{"rendered":"Ball-Parking"},"content":{"rendered":"<div style=\"padding: 1em ;\"><a href=\"http:\/\/xkcd.com\/620\/\">To-Day's Installment of <cite>xkcd<\/cite> by Randall Patrick Munroe<\/a><\/div> <p>The character is drawn about <nobr>33 <abbr title=\"picture element\" style=\"font-size: inherit ;\">pixel<\/abbr>s<\/nobr> tall.  If he's of average height, then that means that 1 <abbr title=\"picture element\" style=\"font-size: inherit ;\">pixel<\/abbr> maps to about <nobr>2 <span style=\"font-size: smaller ; vertical-align: top ;\">1<\/span>\/<span style=\"font-size: smaller ;\">8<\/span> <abbr title=\"inch\" style=\"font-size: inherit ;\">in<\/abbr><\/nobr> (<nobr>5.39 <abbr title=\"centimeter\" style=\"font-size: inherit ;\">cm<\/abbr><\/nobr>).  The pulley above him is drawn about <nobr>431 <abbr title=\"picture element\" style=\"font-size: inherit ;\">pixel<\/abbr>s<\/nobr> above ground, which would then be about <nobr>76 <abbr title=\"foot\" style=\"font-size: inherit ;\">ft<\/abbr><\/nobr> (<nobr>23.22 <abbr title=\"meter\" style=\"font-size: inherit ;\">m<\/abbr><\/nobr>) up.<\/p> <p>At 14% of Earth's gravity, gravitational acceleration on Titan would be at about <nobr>4.5 <abbr title=\"foot\" style=\"font-size: inherit ;\">ft<\/abbr><\/nobr> (<nobr>1.37 <abbr title=\"meter\" style=\"font-size: inherit ;\">m<\/abbr><\/nobr>) per squared second.<\/p> <p>That all means that he hits the ground at about <nobr>17.8 <abbr title=\"miles per hour\" style=\"font-size: inherit ;\">mph<\/abbr><\/nobr> (<nobr>28.7 <abbr title=\"kilometers per hour\" style=\"font-size: inherit ;\">kph<\/abbr><\/nobr>) or less.  That would be the speed associated with a normal fall of about <nobr>10.5 <abbr title=\"foot\" style=\"font-size: inherit ;\">ft<\/abbr><\/nobr> (<nobr>3.2 <abbr title=\"meter\" style=\"font-size: inherit ;\">m<\/abbr><\/nobr>).<\/p>","protected":false},"excerpt":{"rendered":"To-Day's Installment of xkcd by Randall Patrick Munroe The character is drawn about 33 pixels tall. If he's of average height, then that means that 1 pixel maps to about 2 1\/8 in (5.39 cm). The pulley above him is drawn about 431 pixels above ground, which would then be about 76 ft (23.22 m) [&hellip;]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[676,4],"tags":[677,431],"class_list":["post-1996","post","type-post","status-publish","format-standard","hentry","category-physical-science","category-public","tag-dweebery","tag-xkcd"],"_links":{"self":[{"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=\/wp\/v2\/posts\/1996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1996"}],"version-history":[{"count":0,"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=\/wp\/v2\/posts\/1996\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oeconomist.com\/blogs\/daniel\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}