{"id":52665,"date":"2025-09-20T04:58:32","date_gmt":"2025-09-19T19:58:32","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=52665"},"modified":"2025-09-20T04:58:32","modified_gmt":"2025-09-19T19:58:32","slug":"too-late-once-you-see-it-learn-the-secret-of-the-0-2-second-wall-with-the-banknote-catch-challenge-reaction-speed","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=52665&lang=en","title":{"rendered":"Too Late Once You See It! Learn the Secret of the \u20180.2-Second Wall\u2019 with the Banknote Catch Challenge (Reaction Speed)"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>Hi, I&#8217;m Ken Kuwako, your Science Trainer. Every day is an experiment!<\/strong><\/span><\/p>\n<p>Imagine a 1000-yen bill fluttering right in front of you. What if you could snatch it with your fingers? If you could, it&#8217;s yours! Wouldn&#8217;t you want to try a challenge like that? &#x1f609; At first glance, it seems like a super easy game, right? But actually, this challenge hides an amazing secret about the human body and the slightly mischievous reality of the laws of physics.<\/p>\n<h2>The Bill Catch Challenge!<\/h2>\n<p>The rules are incredibly simple.<\/p>\n<p>Person A gently holds the top of the bill, while Person B positions their fingers around the middle. Person A drops the bill without warning, and Person B tries to catch it. That&#8217;s it! If you catch it, you win the bill! &#8230;If someone told you that, you&#8217;d be pumped to try, wouldn&#8217;t you?<\/p>\n<p><iframe loading=\"lazy\" title=\"\u610f\u5730\u60aa\u304a\u672d\u30c1\u30e3\u30ec\u30f3\u30b8\uff01\u843d\u3061\u308b\u304a\u672d\u3092\u30ad\u30e3\u30c3\u30c1\u3067\u304d\u305f\u3089\u30d7\u30ec\u30bc\u30f3\u30c8\uff01\u679c\u305f\u3057\u3066\u63b4\u3080\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u304b\uff1f\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/lbY2E-hYSqM?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><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44010 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/12a1186805fb79ff3b78cd0b7fddd0a5.jpg\" alt=\"\" width=\"361\" height=\"400\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/12a1186805fb79ff3b78cd0b7fddd0a5.jpg 692w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/12a1186805fb79ff3b78cd0b7fddd0a5-271x300.jpg 271w\" sizes=\"auto, (max-width: 361px) 100vw, 361px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44011 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/feb6b3c5c42922c97fb398faeb8f6e04.jpg\" alt=\"\" width=\"342\" height=\"522\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/feb6b3c5c42922c97fb398faeb8f6e04.jpg 514w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/feb6b3c5c42922c97fb398faeb8f6e04-197x300.jpg 197w\" sizes=\"auto, (max-width: 342px) 100vw, 342px\" \/><\/p>\n<p>However, no matter how many times you try, you&#8217;ll likely fail. And there&#8217;s a good reason for that: this challenge is a scientifically &#8220;nearly impossible,&#8221; tricky experiment!<\/p>\n<h3>Why can&#8217;t you catch it? The &#8220;0.2 Second Barrier&#8221; revealed!<\/h3>\n<p>The secret lies in human &#8220;reaction time.&#8221; For us to react to something we see and take action, a series of processes is needed.<\/p>\n<p>You see the bill fall (information input) \u2192 That information travels through your optic nerve to your brain \u2192 Your brain decides, &#8220;The bill fell! Move your fingers!&#8221; and sends a command &#x1f9e0; \u2192 The command travels through your motor nerves to your finger muscles \u2192 Your muscles contract, and finally, your fingers move (action) &#x1f4aa;<\/p>\n<p>This entire sequence, even for the fastest reactors, is said to take about 0.2 seconds. So, in this seemingly &#8220;instant&#8221; 0.2 seconds, how far does the bill drop? This is where the law of physics, &#8220;free fall,&#8221; comes in. The distance an object falls due to gravity increases with the square of the time. In a slightly more complex formula, it&#8217;s written as y = 1\/2 gt^2.<\/p>\n<p>If we plug in the reaction time, t = 0.2 seconds, into this equation and calculate it&#8230;<\/p>\n<p style=\"text-align: center;\">y=1\/2\u00d79.8 m\/s2\u00d7(0.2 s)2=0.196 m\u224819.6 cm<\/p>\n<p>Astonishingly, it drops approximately 19.6 cm! As you know, a 1000-yen bill is 15 cm long. This means that by the time your brain registers &#8220;It&#8217;s falling!&#8221; and your fingers start to move, the bill has already passed below your fingers. It&#8217;s too late once you see it with your eyes. That&#8217;s the scientific reason you can&#8217;t catch the bill!<\/p>\n<h3>Reaction Speed in Everyday Life<\/h3>\n<p>When we do this experiment in class, it&#8217;s always a huge hit! &#8220;Teacher, I almost had that one!&#8221; &#8220;Next time for sure!&#8221; Everyone&#8217;s eyes light up as they try, but the result is always the same. Seeing the students&#8217; frustrated faces is quite enjoyable (of course, since it&#8217;s school, we can&#8217;t actually give them the bill!).<\/p>\n<p>This &#8220;reaction speed&#8221; is actually involved in various aspects of our daily lives. For example, driving a car. In the brief moment it takes to detect danger and hit the brakes, the car continues to move (stopping distance). This is also due to reaction time. Also, in track and field, the starting gun (auditory) is used instead of a flash of light (visual) partly because auditory reaction time is slightly shorter.<\/p>\n<p>What seems like a simple game is actually a profound science experiment that  beautifully combines the mechanisms of the human body (biology) and the laws of motion (physics) . When you explore the &#8220;whys&#8221; hidden in everyday life, the world becomes even more interesting! Please also check out this article:<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"VnQvFgUB48\"><p><a href=\"https:\/\/phys-edu.net\/wp\/?p=43954\">\u5b9a\u898f\u3067\u53cd\u5fdc\u901f\u5ea6\u3092\u78ba\u304b\u3081\u3088\u3046\uff01\u53cd\u5fdc\u6642\u9593\u3092\u78ba\u304b\u3081\u308b\u5b9f\u9a13\u305d\u306e\uff11\uff08\u8996\u899a\u2192\u8133\u2192\u810a\u9ac4\u2192\u624b\u306e\u52d5\u304d\uff09<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;\u5b9a\u898f\u3067\u53cd\u5fdc\u901f\u5ea6\u3092\u78ba\u304b\u3081\u3088\u3046\uff01\u53cd\u5fdc\u6642\u9593\u3092\u78ba\u304b\u3081\u308b\u5b9f\u9a13\u305d\u306e\uff11\uff08\u8996\u899a\u2192\u8133\u2192\u810a\u9ac4\u2192\u624b\u306e\u52d5\u304d\uff09&#8221; &#8212; \u79d1\u5b66\u306e\u30cd\u30bf\u5e33\" src=\"https:\/\/phys-edu.net\/wp\/?p=43954&#038;embed=true#?secret=upRBE7i87P#?secret=VnQvFgUB48\" data-secret=\"VnQvFgUB48\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<h3>Inquiries and Requests<\/h3>\n<p>Discover the wonders and fun of science up close! We&#8217;ve compiled easy-to-understand fun science experiments you can do at home, along with tips. Feel free to search around!<br \/>\n\u30fbAbout the operator, Ken Kuwako: <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">Click here<\/a><br \/>\n\u30fbFor various requests (writing, lectures, experiment workshops, TV supervision, appearances, etc.): <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">Click here<\/a><br \/>\n<span class=\"s2\">\u30fbUpdates on articles are distributed on <a href=\"https:\/\/x.com\/kuwako\">X<\/a>!<\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a><a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">The Science Neta Channel<\/a> streams experiment videos!<\/p>\n<h3>\uff15\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<p>\u30ad\u30fc\u30f3\u3068\u51b7\u3048\u308b\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\uff01\u6c17\u6e29\u304c\u4e0a\u304c\u3063\u3066\u304f\u308b\u3053\u306e\u6642\u671f\u30fb\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\u3092\u4f7f\u3063\u305f\u6607\u83ef\u30fb\u51dd\u7d50\u30fb\u7b49\u901f\u5ea6\u76f4\u7dda\u904b\u52d5\u306e\u5b9f\u9a13\u306f\u3044\u304b\u304c\uff1f<\/p>\r\n<p><img class=\"alignnone wp-image-39516 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe.jpg\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe.jpg 1406w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-300x168.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-1024x572.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-768x429.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-320x180.jpg 320w\" alt=\"\" width=\"453\" height=\"253\" \/><\/p>\r\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=39513\">\u6db2\u4f53\u30bc\u30ed\uff01\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\u304c\u6d88\u3048\u308b\u307e\u3067\u306e\uff13\u6642\u9593\u3092\u79d1\u5b66\u3059\u308b\uff08\u6607\u83ef\u30fb\u51dd\u7d50\u30fb\u7b49\u901f\u5ea6\u76f4\u7dda\u904b\u52d5\uff09<\/a><\/p>\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u76e3\u4fee\u30fb\u30a4\u30d9\u30f3\u30c8\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n<li>4\u670830\u65e5\uff08\u6728\uff09\u300cTHE\u7a81\u7834\u30d5\u30a1\u30a4\u30eb\u300d\uff08\u65e5\u672c\u30c6\u30ec\u30d3\uff09\u306e<a href=\"https:\/\/phys-edu.net\/wp\/?p=62906\">\u79d1\u5b66\u76e3\u4fee\u3092\u62c5\u5f53\u3057\u307e\u3057\u305f<\/a>\u3002<\/li>\r\n<li>5\u67088\u65e5\uff08\u91d1\uff09<a href=\"https:\/\/phys-edu.net\/wp\/?p=62629\">\u7406\u79d1\u6559\u80b2\u30cb\u30e5\u30fc\u30b9<\/a>\u3092\u62c5\u5f53\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li>6\u670814\u65e5\uff08\u65e5\uff09\u3000\u5343\u8449\u5927\u5b66\u30a4\u30f3\u30b9\u30bf\u30ec\u30fc\u30b7\u30e7\u30f3\u300c\u63a2\u7a76\u300d\u306b\u3066\u8b1b\u5e2b\u3092\u52d9\u3081\u307e\u3059<\/li>\r\n<li>6\u670826\u65e5\uff08\u91d1\uff09\u3000\u5343\u8449\u5927\u5b66\u306e\u516c\u958b\u7814\u7a76\u4f1a\uff08\u4e2d\u5b66\u7406\u79d1\u306b\u3064\u3044\u3066\u6388\u696d\u516c\u958b\u4e88\u5b9a\uff09<\/li>\r\n<li>7\u670818\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=60018\">\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u300c\u30ca\u30ea\u30ab\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\u300d\u306e\u8b1b\u5e2b\u3092\u3057\u307e\u3059<\/a>\u3002\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\r\n<\/ul>\r\n<h3><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/h3>\r\n<ul>\r\n<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09<br \/><img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/><br \/><\/strong><\/li>\r\n<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002<br \/><img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/li>\r\n<\/ul>\r\n<h3><span style=\"text-align: center;\">\u5404\u7a2eSNS\uff08\u66f4\u65b0\u60c5\u5831\u3092\u304a\u5c4a\u3051\uff01\uff09<\/span><\/h3>\r\n<p style=\"text-align: center;\"><a style=\"text-align: center;\" href=\"https:\/\/twitter.com\/kuwako\">X(Twitter)<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.instagram.com\/science_seeds\/\">instagram<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.facebook.com\/kuwakolab\/\">Facebook<\/a>\uff08\u65e5\u672c\u8a9e\uff09<\/p>\r\n<p style=\"text-align: center;\"><a style=\"text-align: center;\" href=\"https:\/\/bsky.app\/profile\/kagakunoneta.bsky.social\">BlueSky<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.threads.net\/@science_seeds?hl=ja\">Threads<\/a>\uff08\u82f1\u8a9e\uff09<\/p>\r\n<h3 style=\"text-align: center;\"><strong>Explore<\/strong><\/h3>\r\n<ul>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=30764\">\u697d\u3057\u3044\u5b9f\u9a13<\/a>\u2026\u304a\u5b50\u3055\u3093\u3068\u4e00\u7dd2\u306b\u5922\u4e2d\u306b\u306a\u308c\u308b\u30a4\u30c1\u30aa\u30b7\u306e\u79d1\u5b66\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u9ad8\u6821\u7269\u7406\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306e\u52d5\u753b\u6559\u6750\u3082\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=798\">\u7406\u79d1\u306e\u6559\u6750<\/a>\u2026 \u7406\u79d1\u6559\u5e2b\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\uff01\u6388\u696d\u306e\u8cea\u3092\u9ad8\u3081\u3001\u6e96\u5099\u3092\u52b9\u7387\u5316\u3059\u308b\u305f\u3081\u306e\u9078\u308a\u3059\u3050\u308a\u306e\u6559\u6750\u3092\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a 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href=\"http:\/\/phys-edu.net\/wp\/?page_id=37\">About<\/a>\u00a0\u2026\u300c\u79d1\u5b66\u306e\u30cd\u30bf\u5e33\u300d\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3084\u3001\u904b\u55b6\u8005\u3067\u3042\u308b\u6851\u5b50\u7814\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u30fb\u60f3\u3044\u3092\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a> \u2026\u5b9f\u9a13\u6559\u5ba4\u306e\u3054\u4f9d\u983c\u3001\u57f7\u7b46\u30fb\u8b1b\u6f14\u306e\u76f8\u8ac7\u3001\u79d1\u5b66\u76e3\u4fee\u7b49\u306f\u3053\u3061\u3089\u306e\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\r\n<\/ul>\r\n","protected":false},"excerpt":{"rendered":"<p>Hi, I&#8217;m Ken Kuwako, your Science Trainer. Every day is an experiment! Imagine a 1000-yen bill fluttering [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":44010,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","sns_share_botton_hide":"","vkExUnit_sns_title":"","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default"},"footnotes":""},"categories":[781],"tags":[],"class_list":["post-52665","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-en"],"jetpack_featured_media_url":"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/12a1186805fb79ff3b78cd0b7fddd0a5.jpg","jetpack-related-posts":[{"id":52941,"url":"https:\/\/phys-edu.net\/wp\/?p=52941&lang=en","url_meta":{"origin":52665,"position":0},"title":"Web App Oscilloscope \u2018XXY OSCILLOSCOPE\u2019 \u2014 A Game-Changer for Teaching Sound!","author":"\u6851\u5b50 \u7814","date":"2025\u5e749\u670823\u65e5","format":false,"excerpt":"I'm Ken Kuwako, a science trainer. Every day is an\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/10\/5aa4cb7dfe411c30058d9a5386cc23ad.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/10\/5aa4cb7dfe411c30058d9a5386cc23ad.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/10\/5aa4cb7dfe411c30058d9a5386cc23ad.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/10\/5aa4cb7dfe411c30058d9a5386cc23ad.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":55778,"url":"https:\/\/phys-edu.net\/wp\/?p=55778&lang=en","url_meta":{"origin":52665,"position":1},"title":"From Feline Grace to Kendama Skill: The Hidden Physics of Impact Absorption","author":"\u6851\u5b50 \u7814","date":"2025\u5e7411\u670812\u65e5","format":false,"excerpt":"I'm Kuwako Ken, your Science Trainer. Every day is\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2016\/04\/09730c7fc52358df426ec674a0a25a7c.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":51509,"url":"https:\/\/phys-edu.net\/wp\/?p=51509&lang=en","url_meta":{"origin":52665,"position":2},"title":"Measuring Reaction Time with a Ruler: The Ruler Drop Experiment","author":"\u6851\u5b50 \u7814","date":"2025\u5e749\u67084\u65e5","format":false,"excerpt":"I'm Ken Kuwako, the science trainer. Every day is \u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/bd3aef3d1c22c2116e8a0b9ac4e156ed.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/bd3aef3d1c22c2116e8a0b9ac4e156ed.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/11\/bd3aef3d1c22c2116e8a0b9ac4e156ed.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":60840,"url":"https:\/\/phys-edu.net\/wp\/?p=60840&lang=en","url_meta":{"origin":52665,"position":3},"title":"Never Miss Your Target! The Strange Law That Guarantees a Hit\u2014The Monkey Hunting Game Explained","author":"\u6851\u5b50 \u7814","date":"2026\u5e742\u670825\u65e5","format":false,"excerpt":"I am Science Trainer Ken Kuwako. 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