{"id":806,"date":"2026-05-16T23:59:34","date_gmt":"2026-05-16T14:59:34","guid":{"rendered":"https:\/\/japper-tapchka.blog\/Diary\/?p=806"},"modified":"2026-05-31T00:12:59","modified_gmt":"2026-05-30T15:12:59","slug":"tohoku-2025-physics-3","status":"publish","type":"post","link":"https:\/\/japper-tapchka.blog\/Diary\/tohoku-2025-physics-3\/","title":{"rendered":"\u30102025\u6771\u5317\u5927\u7269\u7406 \u7b2c3\u554f\u3011\u71b1\u529b\u5b66\u3092\u9ad8\u6821\u7269\u7406\u3067\u5fb9\u5e95\u89e3\u8aac\uff5c\u56f3\u89e3\u30fb\u30a4\u30e1\u30fc\u30b8"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u4eca\u56de\u306f\u6771\u5317\u5927\u5b662025\u5e74\u5ea6\u5165\u8a66\u306e\u7269\u7406\u7b2c3\u554f\u306b\u3064\u3044\u3066\u3001\u7d30\u304b\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\uff01\u554f\u984c\u306f\u89e3\u8aac\u306e\u90fd\u5408\u4e0a\u3001\u90e8\u5206\u7684\u306b\u63b2\u8f09\u3057\u3066\u304a\u308a\u307e\u3059\u304c\u3001\u30d5\u30ebPDF\u304c\u6b32\u3057\u3044\u5834\u5408\u306f<a data-type=\"link\" data-id=\"https:\/\/admissions.tohoku.ac.jp\/ja\/materials\/ito\/\" href=\"https:\/\/admissions.tohoku.ac.jp\/ja\/materials\/ito\/\">\u5927\u5b66\u306e\u30db\u30fc\u30e0\u30da\u30fc\u30b8<\/a>\u3084\u4e88\u5099\u6821\u306e\u30b5\u30a4\u30c8\u304b\u3089<a data-type=\"link\" data-id=\"https:\/\/admissions.tohoku.ac.jp\/ja\/adcms\/wp-content\/uploads\/2025\/10\/eq_2025Science.pdf\" href=\"https:\/\/admissions.tohoku.ac.jp\/ja\/adcms\/wp-content\/uploads\/2025\/10\/eq_2025Science.pdf\">\u5165\u624b<\/a>\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/mark><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u524d\u63d0<\/h1>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"776\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/89e6f88373cad45f59c25c8b6064b030-1024x776.jpg\" alt=\"\" class=\"wp-image-808\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/89e6f88373cad45f59c25c8b6064b030-1024x776.jpg 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/89e6f88373cad45f59c25c8b6064b030-300x227.jpg 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/89e6f88373cad45f59c25c8b6064b030-768x582.jpg 768w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/89e6f88373cad45f59c25c8b6064b030.jpg 1210w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">[\u554f(1)] \u652f\u67f1\u3092\u56fa\u5b9a\u3057\u3066\u3044\u308b\u3068\u304d\u306e\u30d4\u30b9\u30c8\u30f3\u306e\u52d5\u304d<\/h1>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"490\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/032d750e5d4a29c992af775bc528d54b-1024x490.png\" alt=\"\" class=\"wp-image-809\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/032d750e5d4a29c992af775bc528d54b-1024x490.png 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/032d750e5d4a29c992af775bc528d54b-300x144.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/032d750e5d4a29c992af775bc528d54b-768x367.png 768w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/032d750e5d4a29c992af775bc528d54b.png 1210w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"795\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/642ff25380baed7ff38551a65f75e069-1024x795.png\" alt=\"\" class=\"wp-image-810\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/642ff25380baed7ff38551a65f75e069-1024x795.png 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/642ff25380baed7ff38551a65f75e069-300x233.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/642ff25380baed7ff38551a65f75e069-768x596.png 768w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/642ff25380baed7ff38551a65f75e069.png 1388w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">(a) \u7a7a\u9593B\u306e\u6e29\u5ea6\u3092\u5909\u3048\u305f\u6642\u306e\u7a7a\u9593A\u306e\u5727\u529b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u7a7a\u9593A\u306e\u6e29\u5ea6\u306f\u4e00\u5b9a\u306e\u305f\u3081\u3001\u7a7a\u9593A\u3060\u3051\u3067\u8003\u3048\u307e\u3057\u3087\u3046\uff01\u72b6\u614b\u65b9\u7a0b\u5f0f\u3088\u308a\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_A (L+x) S = RT_A} $$\n$$ \\color{black}{ \\therefore p_A = \\frac{RT_A}{S(L+x)} } $$<script id=\"wp-hooks-js\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-includes\/js\/dist\/hooks.min.js?ver=f0f188028580e8dc1255\"><\/script>\n<script id=\"wp-i18n-js\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-includes\/js\/dist\/i18n.min.js?ver=1dfe7db3940c23ea9216\"><\/script>\n<script id=\"wp-i18n-js-after\">\nwp.i18n.setLocaleData( { 'text direction\\u0004ltr': [ 'ltr' ] } );\n\/\/# sourceURL=wp-i18n-js-after\n<\/script>\n<script  async id=\"mathjax-js\" src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/mathjax\/2.7.7\/MathJax.js?config=TeX-MML-AM_CHTML\"><\/script>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">(b) \u30d4\u30b9\u30c8\u30f3\u306e\u529b\u306e\u3064\u308a\u5408\u3044<\/h2>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_1b.png\" alt=\"\" class=\"wp-image-1001 size-full\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_1b.png 600w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_1b-300x300.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_1b-150x150.png 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u30d4\u30b9\u30c8\u30f3\u306e\u529b\u306e\u3064\u308a\u5408\u3044\u3088\u308a\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_B S + kx = p_A S} $$<\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">(c) \u7a7a\u9593B\u306e\u6e29\u5ea6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">(a)\u306e\u3088\u3046\u306b\u3001\u7a7a\u9593B\u306e\u72b6\u614b\u65b9\u7a0b\u5f0f\u3092\u8003\u3048\u308b\u3068\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_B (L-x) S = RT_{B1}} $$\n$$ \\color{black}{ \\therefore T_{B1} = \\frac{p_B (L-x) S}{R} = \\frac{p_B SL}{2R} \\left ( \\because x = \\frac{L}{2} \\right )} $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u307e\u305f\u3001(a), (b)\u3088\u308a\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_B = p_A &#8211; \\frac{kx}{S} = \\frac{RT_A}{S(L+x)} &#8211; \\frac{kx}{S} = \\frac{2RT_A}{3SL} &#8211; \\frac{kL}{2S} \\left ( \\because x = \\frac{L}{2} \\right )} $$\n$$ \\color{black}{ \\therefore T_{B1} = \\frac{1}{3} T_A &#8211; \\frac{kL^2}{4R} } $$<\/div>\n\n\n\n<h1 class=\"wp-block-heading\">[\u554f(2)] \u652f\u67f1\u3092\u56fa\u5b9a\u3057\u306a\u3044\u3068\u304d\u306e\u30d4\u30b9\u30c8\u30f3\u306e\u52d5\u304d<\/h1>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"561\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/3a9d3b953c1e34bb76fa814a764f320c-1024x561.png\" alt=\"\" class=\"wp-image-813\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/3a9d3b953c1e34bb76fa814a764f320c-1024x561.png 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/3a9d3b953c1e34bb76fa814a764f320c-300x164.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/3a9d3b953c1e34bb76fa814a764f320c-768x421.png 768w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/3a9d3b953c1e34bb76fa814a764f320c.png 1210w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"944\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/08ff70ac533699d739a8a342f612d8b8-1024x944.jpg\" alt=\"\" class=\"wp-image-812\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/08ff70ac533699d739a8a342f612d8b8-1024x944.jpg 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/08ff70ac533699d739a8a342f612d8b8-300x276.jpg 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/08ff70ac533699d739a8a342f612d8b8-768x708.jpg 768w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/08ff70ac533699d739a8a342f612d8b8.jpg 1210w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"830\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/5d52fa74da30c7db673de83ff78bde7b-1024x830.png\" alt=\"\" class=\"wp-image-814\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/5d52fa74da30c7db673de83ff78bde7b-1024x830.png 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/5d52fa74da30c7db673de83ff78bde7b-300x243.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/5d52fa74da30c7db673de83ff78bde7b-768x622.png 768w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/5d52fa74da30c7db673de83ff78bde7b.png 1401w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"370\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/a2a22905755cfcb5587179bd6605133e-1-1024x370.png\" alt=\"\" class=\"wp-image-816\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/a2a22905755cfcb5587179bd6605133e-1-1024x370.png 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/a2a22905755cfcb5587179bd6605133e-1-300x109.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/a2a22905755cfcb5587179bd6605133e-1-768x278.png 768w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/01\/a2a22905755cfcb5587179bd6605133e-1.png 1388w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">(a) \u30d4\u30b9\u30c8\u30f3\u3092\u56fa\u5b9a\u3057\u3066\u52a0\u71b1\u3057\u305f\u6642\u306e\u6e29\u5ea6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u30d4\u30b9\u30c8\u30f3\u3092\u56fa\u5b9a\u3057\u3066\u7a7a\u9593B\u3092\u52a0\u71b1\u3057\u305f\u305f\u3081\u3001\u7a7a\u9593B\u306f\u5b9a\u7a4d\u5909\u5316\u3067\u3059\uff01\u5b9a\u7a4d\u5909\u5316\u306e\u71b1\u529b\u5b66\u7b2c\u4e00\u6cd5\u5247\u306f\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{Q = \\Delta U} $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u3068\u306a\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u3092\u899a\u3048\u308b\u306e\u3067\u306f\u306a\u304f\u4e00\u822c\u306e\u71b1\u529b\u5b66\u7b2c\u4e00\u6cd5\u5247\u304b\u3089\u8003\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\uff01\ud83d\udd25\ud83d\udd25\u71b1\u529b\u5b66\u7b2c\u4e00\u6cd5\u5247\u306f\u3001\u6c17\u4f53\u304c\u5f97\u305f\u71b1\u91cf\ud835\udc44\u3001\u5185\u90e8\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u5909\u5316\u91cf\ud835\udee5\ud835\udc48\u3001\u6c17\u4f53\u304c\u3057\u305f\u4ed5\u4e8b\ud835\udc4a\u3068\u3057\u3066\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{Q = \\Delta U + W} $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u5b9a\u7a4d\u5909\u5316\u306e\u6642\u3001\u4f53\u7a4d\u306f\u5909\u308f\u3089\u306a\u3044\u2192\u6c17\u4f53\u306f\u4ed5\u4e8b\u3092\u3057\u306a\u3044\u305f\u3081\u3001\ud835\udc4a=0\u3068\u8003\u3048\u308b\u65b9\u304c\u3042\u3089\u3086\u308b\u30d1\u30bf\u30fc\u30f3\u306b\u8003\u3048\u3089\u308c\u308b\u305f\u3081\u3001\u304a\u3059\u3059\u3081\u3067\u3059\uff01<\/mark><\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2a.png\" alt=\"\" class=\"wp-image-1000 size-full\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2a.png 600w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2a-300x300.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2a-150x150.png 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u3055\u3066\u3001\u4eca\u56de\u306f\u5b9a\u7a4d\u5909\u5316\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u71b1\u529b\u5b66\u7b2c\u4e00\u6cd5\u5247\u3092\u8003\u3048\u308b\u3068\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{Q = \\frac{3}{2} R (T_{B2} &#8211; T_{B1})} $$\n$$ \\color{black}{ \\therefore T_{B2} = \\frac{2Q}{3R} + T_{B1} = \\frac{1}{3} T_A + \\frac{2Q}{3R} &#8211; \\frac{kL^2}{4R} } $$<\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">(b) \u30d4\u30b9\u30c8\u30f3\u3092\u56fa\u5b9a\u3057\u3066\u52a0\u71b1\u3057\u305f\u6642\u306e\u5727\u529b\u5909\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u72b6\u614b2\u306e\u7a7a\u9593B\u306e\u72b6\u614b\u65b9\u7a0b\u5f0f\u3092\u8003\u3048\u308b\u3068\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{(p_B + \\Delta p) \\cdot \\left (L &#8211; \\frac{L}{2} \\right ) S = RT_{B2} } $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u72b6\u614b1\u306e\u7a7a\u9593B\u306e\u72b6\u614b\u65b9\u7a0b\u5f0f\u3092\u8003\u3048\u308b\u3068\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_B \\left (L &#8211; \\frac{L}{2} \\right ) S = RT_{B1} } $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u4e21\u8fba\u3092\u5f15\u304f\u3068\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{ \\Delta p \\cdot \\frac{1}{2} LS = R (T_{B2} &#8211; T_{B1}) = \\frac{2}{3} Q} $$\n$$ \\color{black}{ \\therefore \\Delta p = \\frac{4Q}{3SL} } $$<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">(c) \u30d4\u30b9\u30c8\u30f3\u306e\u56fa\u5b9a\u3092\u5916\u3057\u305f\u6642\u306e\u5185\u90e8\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u5909\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u7a7a\u9593A\u306f\u71b1\u6e90\u3068\u63a5\u3057\u3066\u304a\u308a\u3001\u6e29\u5ea6\u306f\u5e38\u306b\ud835\udc47<sub>\ud835\udc34<\/sub>\u3068\u306a\u308a\u307e\u3059\u3002\u3088\u3063\u3066\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{ \\Delta U_A = 0} $$<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">(d) \u30d4\u30b9\u30c8\u30f3\u306e\u56fa\u5b9a\u3092\u5916\u3059\u524d\u3068\u5916\u3057\u305f\u5f8c\u306e\u5727\u529b\u6bd4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u30d4\u30b9\u30c8\u30f3\u56fa\u5b9a\u3092\u5916\u3057\u3001\u652f\u67f1\u3092\u52d5\u304b\u3057\u306a\u304c\u3089\u30d4\u30b9\u30c8\u30f3\u3092\u52d5\u304b\u3059\u3068\u304d\u6c17\u4f53\u306e\u5909\u5316\u306f\u65ad\u71b1\u5909\u5316\u306b\u306a\u308a\u307e\u3059\uff01\ud835\udc65=0\u3067\u9759\u6b62\u3059\u308b\u305f\u3081\u3001\u7a7a\u9593A\u3068\u7a7a\u9593B\u306e\u5727\u529b\u306f\u7b49\u3057\u3044\u3068\u3044\u3046\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u7269\u8cea\u91cf\u3068\u4f53\u7a4d\u3082\u540c\u3058\u305f\u3081\u3001\u6e29\u5ea6\u3082\u540c\u3058\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\uff01\uff01<\/mark><\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2d.png\" alt=\"\" class=\"wp-image-999 size-full\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2d.png 600w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2d-300x300.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2d-150x150.png 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u65ad\u71b1\u5909\u5316\u3068\u3044\u3046\u3053\u3068\u3067\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_{B3} (LS)^ \\gamma = p_{B2} \\left ( \\frac{1}{2} LS \\right )^ \\gamma } $$\n$$ \\color{black}{ \\therefore p_{B3} = \\frac{1}{2^ \\gamma } p_{B2}} $$<\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">(e) \u72b6\u614b1\u304b\u3089\u72b6\u614b2\u3067\u7a7a\u9593B\u306b\u52a0\u3048\u305f\u71b1\u91cf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u554f\u984c\u6587\u3088\u308a\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_{B2} = p_B + \\Delta p = \\frac{4Q + 2RT_A}{3SL} &#8211; \\frac{kL}{2S} } $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u72b6\u614b3\u3067\u306e\u72b6\u614b\u65b9\u7a0b\u5f0f\u3088\u308a\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_{B3} SL = RT_A} $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u4ee5\u4e0a\u304b\u3089\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{ \\frac{1}{2^ \\gamma } \\left ( \\frac{4Q + 2RT_A}{3SL} &#8211; \\frac{kL}{2S} \\right ) SL = RT_A } $$\n$$ \\color{black}{ \\therefore Q = \\left (3 \\cdot 2^{ \\gamma &#8211; 2} &#8211; \\frac{1}{2} \\right ) RT_A + \\frac{3}{8} kL^2} $$<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">(f) \u72b6\u614b2\u304b\u3089\u72b6\u614b3\u3067\u306e\u652f\u67f1\u306e\u79fb\u52d5\u91cf<\/h2>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:42% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_length.png\" alt=\"\" class=\"wp-image-1007 size-full\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_length.png 600w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_length-300x300.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_length-150x150.png 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u81ea\u7136\u9577\u306e\u6642\u306e\u3070\u306d\u306e\u9577\u3055\u306f-\ud835\udc4b<sub>0<\/sub>\u3067\u3042\u308a\u3001\u3070\u306d\u306e\u4f38\u3073<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\ud835\udc66<\/mark>\u306f\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{y = \\{ x &#8211; (X_0 + D &#8211; d) \\} &#8211; (-X_0) = x-D+d} $$<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_force.png\" alt=\"\" class=\"wp-image-997 size-full\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_force.png 600w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_force-300x300.png 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_force-150x150.png 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u30d4\u30b9\u30c8\u30f3\u306e\u4f4d\u7f6e\u304c\ud835\udc65\u306e\u6642\u306e\u7a7a\u9593A, B\u306e\u5727\u529b\u3092\u305d\u308c\u305e\u308c\ud835\udc5d<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u2019<\/mark><sub>\ud835\udc34<\/sub>, \ud835\udc5d<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u2019<\/mark><sub>\ud835\udc35<\/sub>\u3068\u3057\u3001\u30d4\u30b9\u30c8\u30f3\u306e\u529b\u306e\u3064\u308a\u5408\u3044\u3088\u308a\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_B&#8217; S + ky = p_A&#8217; S} $$<\/div>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u7a7a\u9593A\u306f\u6e29\u5ea6\u4e00\u5b9a\u306e\u305f\u3081\u3001\u30dc\u30a4\u30eb\u306e\u6cd5\u5247\u3088\u308a\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_A&#8217; (L+x) S = p_{B3} SL = RT_A} $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u7a7a\u9593B\u306f\u65ad\u71b1\u5909\u5316\u306e\u305f\u3081\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{p_B&#8217; \\left \\{ (L-x) S \\right \\} ^ \\gamma = p_{B3} (SL)^ \\gamma = \\frac{RT_A}{SL} (SL)^ \\gamma } $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u4ee5\u4e0a\u304b\u3089\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{ \\frac{RT_A}{L} \\left ( \\frac{L}{L-x} \\right )^ \\gamma + ky = \\frac{RT_A}{L+x} } $$\n$$ \\color{black}{ \\therefore x &#8211; D + d = \\frac{RT_A}{k(L+x)} &#8211; \\frac{RT_A}{kL} \\left ( \\frac{L}{L-x} \\right )^ \\gamma } $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u3053\u3053\u3067\u3001\ud835\udc65=\ud835\udc3f\/2\u306e\u3068\u304d\ud835\udc51=0\u3068\u306a\u308b\u305f\u3081\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{ \\frac{1}{2} L &#8211; D = \\frac{2RT_A}{3kL} &#8211; \\frac{2^ \\gamma RT_A}{kL} } $$\n$$ \\color{black}{ \\therefore D = \\frac{1}{2} L + \\frac{RT_A}{kL} \\left ( 2^ \\gamma &#8211; \\frac{2}{3} \\right )} $$<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u4ee5\u4e0a\u3092\u5168\u3066\u3001\u6574\u7406\u3059\u308b\u3068\u3001<\/mark><\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">$$ \\color{black}{d = \\frac{1}{2} L &#8211; x + \\frac{RT_A}{k(L+x)} + \\frac{RT_A}{kL} \\left \\{ 2^ \\gamma &#8211; \\left ( \\frac{L}{L-x} \\right )^ \\gamma &#8211; \\frac{2}{3} \\right \\} } $$<\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_mov-1024x683.gif\" alt=\"\" class=\"wp-image-1008\" srcset=\"https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_mov-1024x683.gif 1024w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_mov-300x200.gif 300w, https:\/\/japper-tapchka.blog\/Diary\/wp-content\/uploads\/2026\/05\/Tohoku2025-3_2f_mov-768x512.gif 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">\u3042\u3068\u304c\u304d<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\uff1f\u71b1\u529b\u5b66\u3068\u529b\u5b66\u306e\u878d\u5408\u554f\u984c\u3067\u3088\u304f\u3042\u308b\u30d0\u30cd\u3092\u7528\u3044\u305f\u554f\u984c\u3067\u3057\u305f\uff01\u30d4\u30b9\u30c8\u30f3\u3060\u3051\u3067\u306a\u304f\u3001\u30d0\u30cd\u3092\u652f\u3048\u308b\u652f\u67f1\u3082\u52d5\u304b\u3059\u3053\u3068\u3067\u3088\u308a\u8907\u96d1\u5316\u3057\u3066\u3044\u305f\u304b\u3068\u601d\u3044\u307e\u3059\u3002\u5168\u4f53\u7684\u306a\u30d4\u30b9\u30c8\u30f3\u306e\u52d5\u304d\u3068\u6c17\u4f53\u306e\u72b6\u614b\u306e\u5909\u5316\u306e\u52d5\u304d\u3068\u5404\u30bf\u30a4\u30df\u30f3\u30b0\u306e\u6c17\u4f53\u306e\u72b6\u614b\u3092\u6574\u7406\u3059\u308b\u3068\u89e3\u304d\u3084\u3059\u304f\u306a\u308b\u3068\u601d\u3044\u307e\u3059\uff01\u307e\u305f\u3001\u5f8c\u534a\u306f\u5f0f\u3082\u8907\u96d1\u306b\u306a\u3063\u3066\u3044\u304f\u306e\u3067\u3001\u4ed6\u306e\u554f\u984c\u3092\u512a\u5148\u3059\u308b\u306e\u3082\u3042\u308a\u3067\u3059\u3002<\/mark><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/japper-tapchka.blog\/Diary\/tohoku-2025-physics-1\/\">\u7b2c1\u554f<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/japper-tapchka.blog\/Diary\/tohoku-2025-physics-2\/\">\u7b2c2\u554f<\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/japper-tapchka.blog\/Diary\/tokyo-tech-2025-physics-3\/\">\u6771\u5de5\u5927\u3078<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/japper-tapchka.blog\/Diary\/tokyo-2025-physics-3\/\">\u6771\u5927\u3078<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u56de\u306f\u6771\u5317\u5927\u5b662025\u5e74\u5ea6\u5165\u8a66\u306e\u7269\u7406\u7b2c3\u554f\u306b\u3064\u3044\u3066\u3001\u7d30\u304b\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\uff01\u554f\u984c\u306f\u89e3\u8aac\u306e\u90fd\u5408\u4e0a\u3001\u90e8\u5206\u7684\u306b\u63b2\u8f09\u3057\u3066\u304a\u308a\u307e\u3059\u304c\u3001\u30d5\u30ebPDF\u304c\u6b32\u3057\u3044\u5834\u5408\u306f\u5927\u5b66\u306e\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u3084\u4e88\u5099\u6821\u306e\u30b5\u30a4\u30c8\u304b\u3089\u5165\u624b\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u524d\u63d0 [\u554f(1 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