{"id":7043,"date":"2021-06-05T11:47:02","date_gmt":"2021-06-05T04:47:02","guid":{"rendered":"https:\/\/teky.edu.vn\/blog\/?p=7043"},"modified":"2021-06-05T11:47:02","modified_gmt":"2021-06-05T04:47:02","slug":"vat-ly-lop-7","status":"publish","type":"post","link":"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/","title":{"rendered":"V\u1eadt l\u00fd l\u1edbp 7: Ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1ed1t gi\u00fap l\u00e0m ch\u1ee7 ki\u1ebfn th\u1ee9c"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;7043&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 b\u00ecnh ch\u1ecdn)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;V\u1eadt l\u00fd l\u1edbp 7: Ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1ed1t gi\u00fap l\u00e0m ch\u1ee7 ki\u1ebfn th\u1ee9c&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 b\u00ecnh ch\u1ecdn)    <\/div>\n    <\/div>\n<p style=\"text-align: justify;\"><em><strong>V\u00e2\u0323t ly\u0301 l\u1edbp 7<\/strong> la\u0300 m\u00f4\u0323t trong ca\u0301c m\u00f4n khoa ho\u0323c t\u01b0\u0323 nhi\u00ean cu\u0309a ch\u01b0\u01a1ng tri\u0300nh gia\u0301o du\u0323c THPT. Ki\u00ea\u0301n th\u01b0\u0301c V\u00e2\u0323t ly\u0301 l\u1edbp 7 xoay quanh ca\u0301c n\u00f4\u0323i dung v\u00ea\u0300: a\u0301nh sa\u0301ng, \u00e2m thanh, \u0111i\u00ea\u0323n,&#8230; So v\u01a1\u0301i ki\u00ea\u0301n th\u01b0\u0301c V\u00e2\u0323t ly\u0301 6, ki\u00ea\u0301n th\u01b0\u0301c l\u01a1\u0301p 7 m\u01a1\u0309 r\u00f4\u0323ng va\u0300 n\u00e2ng cao, co\u0301 ph\u00e2\u0300n kho\u0301 h\u01a1n. Tuy nhi\u00ean, ki\u00ea\u0301n th\u01b0\u0301c l\u01a1\u0301p 7 la\u0323i h\u01b0\u0301a he\u0323n r\u00e2\u0301t nhi\u00ea\u0300u \u0111i\u00ea\u0300u thu\u0301 vi\u0323. Ha\u0303y cu\u0300ng Toppy kha\u0301m pha\u0301 t\u00e2\u0301t t\u00e2\u0300n t\u00e2\u0323t th\u00f4ng tin v\u00ea\u0300 V\u00e2\u0323t ly\u0301 7 trong ba\u0300i vi\u00ea\u0301t sau:\u00a0<\/em><\/p>\n<figure id=\"attachment_1231\" aria-describedby=\"caption-attachment-1231\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1231 size-full\" src=\"https:\/\/toppy.vn\/blog\/wp-content\/uploads\/2021\/04\/vat-ly-7-2.jpg\" alt=\" V\u1eadt l\u00fd l\u1edbp 7 v\u01a1\u0301i nhi\u00ea\u0300u ki\u00ea\u0301n th\u01b0\u0301c th\u01b0\u0323c t\u00ea\u0301, thu\u0301 vi\u0323\" width=\"600\" height=\"350\" \/><figcaption id=\"caption-attachment-1231\" class=\"wp-caption-text\">V\u1eadt l\u00fd l\u1edbp 7 v\u01a1\u0301i nhi\u00ea\u0300u ki\u00ea\u0301n th\u01b0\u0301c th\u01b0\u0323c t\u00ea\u0301, thu\u0301 vi\u0323.<\/figcaption><\/figure>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung <\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Tong_quan_chuong_trinh_hoc\" >T\u00f4\u0309ng quan ch\u01b0\u01a1ng tri\u0300nh ho\u0323c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Quang_hoc\" >Quang ho\u0323c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Am_hoc\" >\u00c2m ho\u0323c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Dien_hoc\" >\u0110i\u00ea\u0323n ho\u0323c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Cac_dang_bai_tap_dien_hinh\" >Ca\u0301c da\u0323ng ba\u0300i t\u00e2\u0323p \u0111i\u00ea\u0309n hi\u0300nh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Quang_hoc-2\" >Quang ho\u0323c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Am_hoc-2\" >\u00c2m ho\u0323c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Dien_hoc-2\" >\u0110i\u00ea\u0323n ho\u0323c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Mot_so_sai_lam_khi_hoc_Vat_Ly\" >M\u00f4\u0323t s\u00f4\u0301 sai l\u00e2\u0300m khi ho\u0323c V\u00e2\u0323t Ly\u0301<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Nang_ne_ve_hoc_ly_thuyet\" >N\u0103\u0323ng n\u00ea\u0300 v\u00ea\u0300 ho\u0323c ly\u0301 thuy\u00ea\u0301t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Ngai_lam_bai_tap_giai_thich_tinh_toan\" >Nga\u0323i la\u0300m ba\u0300i t\u00e2\u0323p gia\u0309i thi\u0301ch, ti\u0301nh toa\u0301n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/#Tong_ket\" >T\u00f4\u0309ng k\u00ea\u0301t<\/a><\/li><\/ul><\/nav><\/div>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Tong_quan_chuong_trinh_hoc\"><\/span>T\u00f4\u0309ng quan ch\u01b0\u01a1ng tri\u0300nh ho\u0323c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">Ch\u01b0\u01a1ng tri\u0300nh ho\u0323c V\u1eadt l\u00fd l\u1edbp 7 xoay quanh c\u00e2\u0301c n\u00f4\u0323i dung: quang ho\u0323c, \u00e2m ho\u0323c va\u0300 \u0111i\u00ea\u0323n ho\u0323c. Ki\u00ea\u0301n th\u01b0\u0301c V\u1eadt l\u00fd l\u1edbp 7 trang bi\u0323 cho ca\u0301c em ho\u0323c sinh nh\u01b0\u0303ng n\u00f4\u0323i dung th\u01b0\u0323c t\u00ea\u0301, g\u0103\u0301n li\u00ea\u0300n v\u01a1\u0301i cu\u00f4\u0323c s\u00f4\u0301ng th\u01b0\u01a1\u0300ng nga\u0300y. Chi ti\u00ea\u0301t n\u00f4\u0323i dung ho\u0323c g\u00f4\u0300m:<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Quang_hoc\"><\/span>Quang ho\u0323c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"text-align: justify;\">\n<li>\u0110i\u0323nh lu\u00e2\u0323t truy\u00ea\u0300n th\u0103\u0309ng cu\u0309a a\u0301nh sa\u0301ng va\u0300 \u01b0\u0301ng du\u0323ng trong th\u01b0\u0323c t\u00ea\u0301.<\/li>\n<li>\u0110i\u0323nh lu\u00e2\u0323t pha\u0309n xa\u0323 a\u0301nh sa\u0301ng.<\/li>\n<li>A\u0309nh cu\u0309a v\u00e2\u0323t ta\u0323o b\u01a1i g\u01b0\u01a1ng ph\u0103\u0309ng, ti\u0301nh ch\u00e2\u0301t cu\u0309a a\u0309nh ta\u0323o b\u01a1\u0309i g\u01b0\u01a1ng ph\u0103\u0309ng,&#8230;<\/li>\n<li>G\u01b0\u01a1ng c\u00e2\u0300u l\u00f4\u0300i: \u0111\u0103\u0323c \u0111i\u00ea\u0309m, ti\u0301nh ch\u00e2\u0301t, \u01b0\u0301ng du\u0323ng,&#8230;<\/li>\n<li>G\u01b0\u01a1ng lo\u0303m: ti\u0301nh ch\u00e2\u0301t, \u0111\u0103\u0323c \u0111i\u00ea\u0309m, ta\u0301c du\u0323ng,&#8230;<\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Am_hoc\"><\/span>\u00c2m ho\u0323c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"text-align: justify;\">\n<li>\u0110\u00f4\u0323 cao cu\u0309a \u00e2m.<\/li>\n<li>\u0110\u00f4\u0323 to cu\u0309a \u00e2m.<\/li>\n<li>M\u00f4i tr\u01b0\u01a1\u0300ng truy\u00ea\u0300n \u00e2m.<\/li>\n<li>\u00c2m pha\u0309n xa\u0323, pha\u0309n xa\u0323 \u00e2m ti\u00ea\u0301ng vang.<\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Dien_hoc\"><\/span>\u0110i\u00ea\u0323n ho\u0323c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"text-align: justify;\">\n<li>Nhi\u00ea\u0303m \u0111i\u00ea\u0323n: s\u01b0\u0323 nhi\u00ea\u0303m \u0111i\u00ea\u0323n do co\u0323 xa\u0301t, gia\u0309i thi\u0301ch hi\u00ea\u0323n t\u01b0\u01a1\u0323ng,&#8230;<\/li>\n<li>Hai loa\u0323i \u0111i\u00ea\u0323n ti\u0301ch.<\/li>\n<li>Do\u0300ng \u0111i\u00ea\u0323n va\u0300 ngu\u00f4\u0300n \u0111i\u00ea\u0323n.<\/li>\n<li>Ch\u00e2\u0301t d\u00e2\u0303n \u0111i\u00ea\u0323n va\u0300 ch\u00e2\u0301t ca\u0301ch \u0111i\u00ea\u0323n.<\/li>\n<li>S\u01a1 \u0111\u00f4\u0300 ma\u0323ch \u0111i\u00ea\u0323n, chi\u00ea\u0300u do\u0300ng \u0111i\u00ea\u0323n.<\/li>\n<li>C\u01b0\u01a1\u0300ng \u0111\u00f4\u0323 do\u0300ng \u0111i\u00ea\u0323n: \u0111\u01a1n vi\u0323 \u0111o, ky\u0301 hi\u00ea\u0323u, ca\u0301ch \u0111o,&#8230;<\/li>\n<li>Hi\u00ea\u0323u \u0111i\u00ea\u0323n th\u00ea\u0301: ky\u0301 hi\u00ea\u0323u, c\u00f4ng th\u01b0\u0301c,&#8230;<\/li>\n<\/ul>\n<p><em><strong>&gt;&gt;\u0110o\u0323c th\u00eam:<\/strong> <a href=\"https:\/\/toppy.vn\/lop\/lop-7\">\u0110\u1ec3 h\u1ecdc sinh l\u1edbp 7 l\u00e0m ch\u1ee7 ki\u1ebfn th\u1ee9c: C\u00e1ch h\u1ecdc gi\u1ecfi l\u1edbp 7<\/a><\/em><\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Cac_dang_bai_tap_dien_hinh\"><\/span>Ca\u0301c da\u0323ng ba\u0300i t\u00e2\u0323p \u0111i\u00ea\u0309n hi\u0300nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Quang_hoc-2\"><\/span>Quang ho\u0323c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 1:<\/strong> Ly\u0301 gia\u0309i nguy\u00ean nh\u00e2n cu\u0309a hi\u00ea\u0323n t\u01b0\u01a1\u0323ng v\u00e2\u0323t ly\u0301: Khi A \u0111\u1eb7t c\u00e2y bu\u0301t \u1edf d\u01b0\u1edbi m\u1ed9t ng\u1ecdn \u0111\u00e8n \u0111i\u1ec7n d\u00e2y t\u00f3c. A th\u00e2\u0301y b\u00f3ng cu\u0309a c\u00e2y bu\u0301t tr\u00ean m\u1eb7t b\u00e0n r\u00f5 n\u00e9t. Khi A \u0111\u0103\u0323t c\u00e2y bu\u0301t d\u01b0\u1edbi b\u00f3ng \u0111\u00e8n \u1ed1ng th\u00ec b\u00f3ng c\u1ee7a c\u00e2y bu\u0301t l\u1ea1i bi\u0323 nh\u00f2e?<\/p>\n<p style=\"text-align: justify;\">L\u01a1\u0300i gia\u0309i: \u0110\u00e8n \u0111i\u1ec7n d\u00e2y t\u00f3c l\u00e0 m\u1ed9t ngu\u1ed3n s\u00e1ng h\u1eb9p. V\u00f9ng b\u00f3ng n\u1eeda t\u1ed1i r\u1ea5t h\u1eb9p \u1edf xung quanh v\u00f9ng b\u00f3ng t\u1ed1i. B\u1edfi th\u1ebf \u1edf ph\u00eda sau c\u00e2y bu\u0301t A nh\u00ecn th\u1ea5y ch\u1ee7 y\u1ebfu l\u00e0 v\u00f9ng b\u00f3ng t\u1ed1i r\u00f5 n\u00e9t. V\u00f9ng b\u00f3ng n\u1eeda t\u1ed1i \u1edf xung quanh kh\u00f4ng \u0111\u00e1ng k\u1ec3.<\/p>\n<p style=\"text-align: justify;\">\u0110\u00e8n \u1ed1ng l\u00e0 ngu\u1ed3n s\u00e1ng r\u1ed9ng. N\u00ean v\u00f9ng b\u00f3ng t\u1ed1i \u1edf sau b\u00e0n tay h\u1ea7u nh\u01b0 kh\u00f4ng \u0111\u00e1ng k\u1ec3. Ph\u1ea7n l\u1edbn l\u00e0 v\u00f9ng b\u00f3ng n\u1eeda t\u00f4\u0301i \u1edf xung quanh, n\u00ean b\u00f3ng c\u00e2y bu\u0301t b\u1ecb nh\u00f2e.<\/p>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 2:<\/strong> Chi\u1ebfu m\u1ed9t tia s\u00e1ng l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng ta thu \u0111\u01b0\u1ee3c m\u1ed9t tia ph\u1ea3n x\u1ea1 t\u1ea1o v\u1edbi tia t\u1edbi m\u1ed9t g\u00f3c 40 \u0111\u00f4\u0323. Ho\u0309i g\u00f3c t\u1edbi la\u0300 bao nhi\u00eau?<\/p>\n<p style=\"text-align: justify;\">L\u1eddi gi\u1ea3i:<\/p>\n<p style=\"text-align: justify;\">Theo \u0111\u1ec1 b\u00e0i ta c\u00f3: tia ph\u1ea3n x\u1ea1 t\u1ea1o v\u1edbi tia t\u1edbi m\u1ed9t g\u00f3c 40 \u0111\u00f4\u0323 n\u00ean ta co\u0301: i + i\u2032=40(1)<\/p>\n<p style=\"text-align: justify;\">Theo \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng: G\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng g\u00f3c t\u1edbi: i\u2032= i(2)<\/p>\n<p style=\"text-align: justify;\">T\u1eeb (1) v\u00e0 (2) ta suy ra: i = i\u2032= 40\/2 = 20<\/p>\n<p style=\"text-align: justify;\">V\u00e2\u0323y go\u0301c t\u01a1\u0301i la\u0300 20 \u0111\u00f4\u0323.<\/p>\n<p><strong>&gt;&gt; Xem th\u00eam :<\/strong> <a class=\"LinkSuggestion__Link-sc-1gewdgc-4 evyocv\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-6\/\" target=\"_blank\" rel=\"noopener\">V\u1eadt l\u00fd l\u1edbp 6 : Bi\u0301 quy\u00ea\u0301t h\u1ecdc t\u1eadp gi\u00fap n\u00e2ng cao \u0111i\u1ec3m s\u1ed1<\/a><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Am_hoc-2\"><\/span>\u00c2m ho\u0323c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 1:<\/strong> Khi na\u0300o v\u00e2\u0323t pha\u0301t ra \u00e2m cao h\u01a1n? Gia\u0309i thi\u0301ch.<\/p>\n<p style=\"text-align: justify;\">L\u01a1\u0300i gia\u0309i: \u00c2m cao hay th\u00e2\u0301p phu\u0323 thu\u00f4\u0323c va\u0300o t\u00e2\u0300n s\u00f4\u0301 dao \u0111\u00f4\u0323ng. T\u00e2\u0300n s\u00f4\u0301 dao \u0111\u00f4\u0323ng l\u01a1\u0301n \u00e2m pha\u0301t ra cao h\u01a1n.<\/p>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 2:<\/strong> Ta\u0323i sao khi ta th\u00f4\u0309i ma\u0323nh \u00e2m thanh cu\u0309a ke\u0300n la\u0301 chu\u00f4\u0301i pha\u0301t ra to h\u01a1n?<\/p>\n<figure id=\"attachment_1230\" aria-describedby=\"caption-attachment-1230\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1230\" src=\"https:\/\/toppy.vn\/blog\/wp-content\/uploads\/2021\/04\/vat-ly-7-1-1.jpg\" alt=\"\u00c2m thanh ke\u0300n la\u0301 chu\u00f4\u0301i\" width=\"600\" height=\"350\" \/><figcaption id=\"caption-attachment-1230\" class=\"wp-caption-text\">\u00c2m thanh ke\u0300n la\u0301 chu\u00f4\u0301i<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">L\u01a1\u0300i gia\u0309i: Khi ta th\u00f4\u0309i ma\u0323nh, \u00e2m thanh \u01a1\u0309 \u0111\u00e2\u0300u be\u0323t cu\u0309a ke\u0300n la\u0301 chu\u00f4\u0301i dao \u0111\u00f4\u0323ng ma\u0323nh, bi\u00ean \u0111\u00f4\u0323 l\u01a1\u0301n n\u00ean \u00e2m thanh to h\u01a1n.<\/p>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 3:<\/strong> V\u00e2\u0323n t\u00f4\u0301c truy\u00ea\u0300n \u00e2m trong kh\u00f4ng khi\u0301 la\u0300 340m\/s. \u00d4ng A nghe th\u00e2\u0301y ti\u00ea\u0301ng se\u0301t sau ti a ch\u01a1\u0301p 5 gi\u00e2y. Ho\u0309i khoa\u0309ng ca\u0301ch t\u01b0\u0300 \u00f4ng A \u0111\u00ea\u0301n n\u01a1i xa\u0309y ra se\u0301t la\u0300 bao xa?<\/p>\n<p style=\"text-align: justify;\">L\u01a1\u0300i gia\u0309i: Khoa\u0309ng ca\u0301ch t\u01b0\u0300 \u00f4ng A t\u01a1\u0301i n\u01a1i xa\u0309y ra xe\u0301t la\u0300: s= v x t = 340 x 5 = 1700m<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Dien_hoc-2\"><\/span>\u0110i\u00ea\u0323n ho\u0323c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 1:<\/strong><\/p>\n<p style=\"text-align: justify;\">Ba\u0300i 2: \u0110\u00f4\u0309i \u0111\u01a1n vi\u0323 v\u00e2\u0323t ly\u0301 sau:<\/p>\n<p style=\"text-align: justify;\">100kV = &#8230; V<\/p>\n<p style=\"text-align: justify;\">0,2V = &#8230; mV<\/p>\n<p style=\"text-align: justify;\">5kV= &#8230; V<\/p>\n<p style=\"text-align: justify;\">150kV = &#8230; V<\/p>\n<p>0,35V = &#8230;mV<\/p>\n<p style=\"text-align: justify;\"><strong>L\u01a1\u0300i gia\u0309i:<\/strong><\/p>\n<p style=\"text-align: justify;\">100kV = 100 000 V<\/p>\n<p style=\"text-align: justify;\">0,2V = 200 mV<\/p>\n<p style=\"text-align: justify;\">5kV = 5000 V<\/p>\n<p style=\"text-align: justify;\">150kV = 150 000V<\/p>\n<p>0,35V = 350mV<\/p>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 2:<\/strong> Ta\u0323i sao \u01a1\u0309 ca\u0301c ch\u01a1\u0309 x\u0103ng ng\u01b0\u01a1\u0300i ta th\u01b0\u01a1\u0300ng n\u00f4\u0301i m\u00f4\u0323t \u0111\u00e2\u0300u s\u01a1\u0323i d\u00e2y xi\u0301ch v\u01a1\u0301i thu\u0300ng x\u0103ng, m\u00f4\u0323t \u0111\u00e2\u0300u co\u0300n la\u0323i ke\u0301o l\u00ea d\u01b0\u01a1\u0301i \u0111\u01b0\u01a1\u0300ng?<\/p>\n<figure id=\"attachment_1227\" aria-describedby=\"caption-attachment-1227\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1227\" src=\"https:\/\/toppy.vn\/blog\/wp-content\/uploads\/2021\/04\/vat-ly-7.jpg\" alt=\"Xe b\u00f4\u0300n ch\u01a1\u0309 x\u0103ng \u0111\u00ea\u0300u \u0111\u01b0\u01a1\u0323c n\u00f4\u0301i d\u00e2y xi\u0301ch\" width=\"600\" height=\"350\" \/><figcaption id=\"caption-attachment-1227\" class=\"wp-caption-text\">Xe b\u00f4\u0300n ch\u01a1\u0309 x\u0103ng \u0111\u00ea\u0300u \u0111\u01b0\u01a1\u0323c n\u00f4\u0301i d\u00e2y xi\u0301ch xu\u00f4\u0301ng \u0111\u01b0\u01a1\u0300ng<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">L\u01a1\u0300i gia\u0309i: Ta du\u0300ng ly\u0301 thuy\u00ea\u0301t ch\u00e2\u0301t d\u00e2\u0303n \u0111i\u00ea\u0323n \u0111\u00ea\u0309 gia\u0309i thi\u0301ch hi\u00ea\u0323n t\u01b0\u01a1\u0323ng na\u0300y. \u00d4 t\u00f4 khi di chuy\u00ea\u0309n se\u0303 co\u0323 xa\u0301t ma\u0323nh v\u01a1\u0301i koong khi\u0301. Nhi\u00ea\u0300u b\u00f4\u0323 ph\u00e2\u0323n cu\u0309a \u00f4 t\u00f4 bi\u0323 nhi\u00ea\u0303m \u0111i\u00ea\u0323n. Khi nhi\u00ea\u0303m \u0111i\u00ea\u0323n ma\u0323nh se\u0303 xu\u00e2\u0301t hi\u00ea\u0323n ca\u0301c tia l\u01b0\u0309a \u0111i\u00ea\u0323n nguy c\u01a1 g\u00e2y cha\u0301y n\u00f4\u0309 r\u00e2\u0301t cao. S\u01b0\u0309 du\u0323ng d\u00e2y xi\u0301ch \u0111\u00ea\u0309 ch\u00f4\u0301ng cha\u0301y n\u00f4\u0309. D\u00e2y xi\u0301ch se\u0303 d\u00e2\u0303n \u0111i\u00ea\u0323n xu\u00f4\u0301ng d\u01b0\u01a1\u0301i \u0111\u01b0\u01a1\u0300ng la\u0300m gia\u0309m s\u01b0\u0323 nhi\u00ea\u0303m \u0111i\u00ea\u0323n ma\u0323nh.<\/p>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 3:<\/strong> Trong ca\u0301c v\u00e2\u0323t sau, v\u00e2\u0323t na\u0300o ca\u0301ch \u0111i\u00ea\u0323t, v\u00e2\u0323t na\u0300o d\u00e2\u0303n \u0111i\u00ea\u0323n: n\u01b0\u01a1\u0301c, \u0111oa\u0323n d\u00e2y nh\u01b0\u0323a, ru\u00f4\u0323t bu\u0301t chi\u0300, khu\u0301c g\u00f4\u0303, \u0111oa\u0323n d\u00e2y nh\u00f4m, \u0111oa\u0323n d\u00e2y the\u0301p?<\/p>\n<p style=\"text-align: justify;\">L\u01a1\u0300i gia\u0309i: \u0110oa\u0323n d\u00e2y nh\u01b0\u0323a va\u0300 khu\u0301c g\u00f4\u0303 la\u0300 v\u00e2\u0323t ca\u0301ch \u0111i\u00ea\u0323n.<\/p>\n<p style=\"text-align: justify;\">\u0110oa\u0323n d\u00e2y nh\u00f4m, \u0111oa\u0323n d\u00e2y the\u0301p, ru\u00f4\u0323t bu\u0301t chi\u0300, n\u01b0\u01a1\u0301c la\u0300 v\u00e2\u0323t d\u00e2\u0303n \u0111i\u00ea\u0323n.<\/p>\n<p style=\"text-align: justify;\"><strong>Ba\u0300i 4:<\/strong> Ta\u0323i sao ng\u01b0\u01a1\u0300i ta pha\u0309i l\u0103\u0301p c\u00e2\u0300u chi\u0300 trong ca\u0301c ma\u0323ch \u0111i\u00ea\u0323n?<\/p>\n<p style=\"text-align: justify;\">L\u01a1\u0300i gia\u0309i: L\u0103\u0301p c\u00e2\u0300u tri\u0300 \u0111\u00ea\u0309 \u0111a\u0309m ba\u0309o an toa\u0300n, tra\u0301nh ho\u0309ng toa\u0300n b\u00f4\u0323 ma\u0323ch \u0111i\u00ea\u0323n. Khi do\u0300ng \u0111i\u00ea\u0323n l\u01a1\u0301n h\u01a1n \u0111i\u0323nh m\u01b0\u0301c trong ma\u0323ch \u0111i\u00ea\u0323n, c\u00e2\u0300u tri\u0300 se\u0303 t\u01b0\u0323 ng\u0103\u0301t.<\/p>\n<figure id=\"attachment_2356\" aria-describedby=\"caption-attachment-2356\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/tailieu.toppy.vn\/?utm_source=blog&amp;utm_medium=baiviet\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2356\" src=\"https:\/\/toppy.vn\/blog\/wp-content\/uploads\/2021\/05\/kho-tai-lieu-hoc-tap-mien-phi1.jpg\" alt=\" V\u1eadt l\u00fd l\u1edbp 7 v\u01a1\u0301i nhi\u00ea\u0300u ki\u00ea\u0301n th\u01b0\u0301c th\u01b0\u0323c t\u00ea\u0301, thu\u0301 vi\u0323\" width=\"600\" height=\"400\" \/><\/a><figcaption id=\"caption-attachment-2356\" class=\"wp-caption-text\">Kho t\u00e0i li\u1ec7u h\u1ecdc t\u1eadp Mi\u1ec5n Ph\u00ed &#8211; Toppy<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Mot_so_sai_lam_khi_hoc_Vat_Ly\"><\/span>M\u00f4\u0323t s\u00f4\u0301 sai l\u00e2\u0300m khi ho\u0323c V\u00e2\u0323t Ly\u0301<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Nang_ne_ve_hoc_ly_thuyet\"><\/span>N\u0103\u0323ng n\u00ea\u0300 v\u00ea\u0300 ho\u0323c ly\u0301 thuy\u00ea\u0301t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Kh\u00f4ng phu\u0309 nh\u00e2\u0323n ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c ly\u0301 thuy\u00ea\u0301t cu\u0309a <a href=\"https:\/\/toppy.vn\/mon\/vat-ly-lop-7\">ch\u01b0\u01a1ng tri\u0300nh V\u00e2\u0323t Ly\u0301 7<\/a> la\u0300 kha\u0301 l\u01a1\u0301n. Tuy nhi\u00ean, chu\u0301ng ta kh\u00f4ng n\u00ean qua\u0301 n\u0103\u0323ng n\u00ea\u0300 v\u00ea\u0300 vi\u00ea\u0323c ho\u0323c thu\u00f4\u0323c lo\u0300ng y nguy\u00ean ca\u0301c ly\u0301 thuy\u00ea\u0301t trong sa\u0301ch. Ho\u0323c thu\u00f4\u0323c lo\u0300ng kh\u00f4\u0301i l\u01b0\u01a1\u0323ng l\u01a1\u0301n ki\u00ea\u0301n th\u01b0\u0301c th\u00e2\u0323t s\u01b0\u0323 kh\u00f4ng \u0111em la\u0323i hi\u00ea\u0323u qua\u0309 cao trong ho\u0323c t\u00e2\u0323p. \u0110i\u00ea\u0300u na\u0300y cu\u0303ng khi\u00ea\u0301n na\u0309y sinh t\u00e2m ly\u0301 cha\u0301n na\u0309n, l\u01b0\u01a1\u0300i ho\u0323c.<\/p>\n<p>V\u00e2\u0323y gia\u0309i pha\u0301p la\u0300 gi\u0300? Gia\u0309i pha\u0301p Toppy mu\u00f4\u0301n \u0111em \u0111\u00ea\u0301n cho ca\u0301c ba\u0323n ho\u0323c sinh la\u0300 ho\u0323c hi\u00ea\u0309u. Ho\u0323c hi\u00ea\u0309u thay vi\u0300 ho\u0323c ve\u0323t. Hi\u00ea\u0309u ba\u0309n ch\u00e2\u0301t cu\u0309a v\u00e2\u0301n \u0111\u00ea\u0300, n\u00f4\u0323i dung ca\u0301c \u0111i\u0323nh nghi\u0303a, \u0111i\u0323nh lu\u00e2\u0323t. Kh\u00f4ng ai y\u00eau c\u00e2\u0300u chu\u0301ng ta pha\u0309i thu\u00f4\u0323c y nh\u01b0 sa\u0301ch. \u0110i\u00ea\u0300u c\u00e2\u0300n thi\u00ea\u0301t \u01a1\u0309 \u0111\u00e2y la\u0300 hi\u00ea\u0309u \u0111u\u0309, hi\u00ea\u0309u \u0111u\u0301ng, hi\u00ea\u0309u s\u00e2u.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ngai_lam_bai_tap_giai_thich_tinh_toan\"><\/span>Nga\u0323i la\u0300m ba\u0300i t\u00e2\u0323p gia\u0309i thi\u0301ch, ti\u0301nh toa\u0301n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u00f4\u0323t b\u00f4\u0323 ph\u00e2\u0323n ca\u0301c ba\u0323n ho\u0323c sinh r\u00e2\u0301t l\u01b0\u01a1\u0300i la\u0300m ca\u0301c ba\u0300i t\u00e2\u0323p gia\u0309i thi\u0301ch. Ca\u0301c ba\u0300i t\u00e2\u0323p na\u0300y \u0111o\u0300i ho\u0309i pha\u0309i s\u01b0\u0309 du\u0323ng ly\u0301 thuy\u00ea\u0301t \u0111\u00ea\u0309 gia\u0309i thi\u0301ch. Vi\u00ea\u0323c l\u01b0\u01a1\u0300i ho\u0323c ly\u0301 thuy\u00ea\u0301t la\u0300 nguy\u00ean nh\u00e2n g\u00f4\u0301c r\u00ea\u0303 cu\u0309a vi\u00ea\u0323c l\u01b0\u01a1\u0300i la\u0300m ba\u0300i t\u00e2\u0323p gia\u0309i thi\u0301ch. \u0110\u00f4\u0301i v\u01a1\u0301i ca\u0301c ba\u0300i ti\u0301nh toa\u0301n y\u00eau c\u00e2\u0300u a\u0301p du\u0323ng ca\u0301c c\u00f4ng th\u01b0\u0301c \u0111\u00ea\u0309 gia\u0309i. Thi\u00ea\u0301u ki\u00ea\u0301n th\u01b0\u0301c ly\u0301 thuy\u00ea\u0301t d\u00e2\u0303n \u0111\u00ea\u0301n kh\u00f4ng nh\u01a1\u0301, nh\u01a1\u0301 sai c\u00f4ng th\u01b0\u0301c. T\u01b0\u0300 \u0111o\u0301, ca\u0301c ba\u0323n ho\u0323c sinh g\u0103\u0323p kho\u0301 kh\u0103n trong gia\u0309i ba\u0300i t\u00e2\u0323p d\u00e2\u0300n \u0111\u00ea\u0301n nga\u0323i la\u0300m ba\u0300i, nga\u0323i ho\u0323c nay ca\u0300ng nga\u0323i h\u01a1n. L\u00e2u d\u00e2\u0300n se\u0303 hi\u0300nh tha\u0300nh ca\u0301c l\u00f4\u0303 h\u00f4\u0309ng ki\u00ea\u0301n th\u01b0\u0301c. M\u00f4n V\u00e2\u0323t Ly\u0301 se\u0303 ca\u0300ng tr\u01a1\u0309 n\u00ean kho\u0301 h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tong_ket\"><\/span>T\u00f4\u0309ng k\u00ea\u0301t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">Tr\u00ean \u0111\u00e2y, Toppy t\u00f4\u0309ng h\u01a1\u0323p h\u00ea\u0323 th\u00f4\u0301ng ki\u00ea\u0301n th\u01b0\u0301c cu\u0309a V\u1eadt l\u00fd l\u1edbp 7 cu\u0300ng ca\u0301c da\u0323ng ba\u0300i t\u00e2\u0323p \u0111i\u00ea\u0309n hi\u0300nh. V\u01a1\u0301i ba\u0300i vi\u00ea\u0301t na\u0300y, Toppy mong mu\u00f4\u0301n ba\u0323n co\u0301 ca\u0301i nhi\u0300n t\u00f4\u0309ng qua\u0301t, hi\u0300nh dung \u0111\u01b0\u01a1\u0323c ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c c\u01a1 ba\u0309n c\u00e2\u0300n ho\u0323c. Ba\u0323n co\u0301 th\u00ea\u0309 tham kha\u0309o <a href=\"https:\/\/toppy.vn\/blog\/\">kho\u0301a ho\u0323c m\u00f4n V\u00e2\u0323t ly\u0301 cu\u0300ng gia s\u01b0 tr\u01b0\u0323c tuy\u00ea\u0301n cu\u0309a Toppy.<\/a> T\u00e2\u0301t t\u00e2\u0300n t\u00e2\u0323t ki\u00ea\u0301n th\u01b0\u0301c V\u00e2\u0323t ly\u0301 t\u01b0\u0300 l\u01a1\u0301p 6 \u0111\u00ea\u0301n lo\u0301p 12 \u0111\u01b0\u01a1\u0323c thi\u00ea\u0301t k\u00ea\u0301 tr\u01b0\u0323c quan. Toppy n\u00f4\u0309i b\u00e2\u0323t v\u01a1\u0301i ph\u01b0\u01a1ng th\u01b0\u0301c truy\u00ea\u0300n \u0111a\u0323t d\u00ea\u0303 hi\u00ea\u0309u. L\u00f4\u0323 tri\u0300nh ho\u0323c t\u00e2\u0323p ca\u0301 nh\u00e2n ho\u0301a. Ghe\u0301 th\u0103m blog Toppy \u0111\u00ea\u0309 kha\u0301m pha\u0301 tro\u0323n b\u00f4\u0323 bi\u0301 quy\u00ea\u0301t ho\u0323c t\u00e2\u0323p t\u00e2\u0301t ca\u0309 ca\u0301c m\u00f4n.<\/p>\n<p><strong>Gi\u00fap h\u1ecdc t\u1ed1t l\u1edbp c\u00e1c m\u00f4n l\u1edbp 7<\/strong><\/p>\n<ul>\n<li>Tr\u1ea3i nghi\u1ec7m h\u1ecdc mi\u1ec5n ph\u00ed. <a href=\"https:\/\/toppy.vn\/mon\/toan-lop-7\">M\u00f4n to\u00e1n l\u1edbp 7<\/a><\/li>\n<li>Tr\u1ea3i nghi\u1ec7m h\u1ecdc mi\u1ec5n ph\u00ed. <a href=\"https:\/\/toppy.vn\/mon\/tieng-anh-lop-7\">M\u00f4n Ti\u1ebfng Anh l\u1edbp 7\u00a0<\/a><\/li>\n<li>Tr\u1ea3i nghi\u1ec7m h\u1ecdc mi\u1ec5n ph\u00ed. <a href=\"https:\/\/toppy.vn\/mon\/ielts-lop-7\">Ielts cho h\u1ecdc sinh l\u1edbp 7<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>V\u00e2\u0323t ly\u0301 l\u1edbp 7 la\u0300 m\u00f4\u0323t trong ca\u0301c m\u00f4n khoa ho\u0323c t\u01b0\u0323 nhi\u00ean cu\u0309a ch\u01b0\u01a1ng tri\u0300nh gia\u0301o du\u0323c THPT. Ki\u00ea\u0301n th\u01b0\u0301c V\u00e2\u0323t ly\u0301 l\u1edbp 7 xoay quanh ca\u0301c n\u00f4\u0323i dung v\u00ea\u0300: a\u0301nh sa\u0301ng, \u00e2m thanh, \u0111i\u00ea\u0323n,&#8230; So v\u01a1\u0301i ki\u00ea\u0301n th\u01b0\u0301c V\u00e2\u0323t ly\u0301 6, ki\u00ea\u0301n th\u01b0\u0301c l\u01a1\u0301p 7 m\u01a1\u0309 r\u00f4\u0323ng va\u0300 n\u00e2ng cao, co\u0301 ph\u00e2\u0300n kho\u0301 &hellip;<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"show_on_app":false,"footnotes":""},"categories":[108],"tags":[],"class_list":["post-7043","post","type-post","status-publish","format-standard","hentry","category-goc-hoc-tap"],"acf":{"show_on_app":false},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.9 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>V\u1eadt l\u00fd l\u1edbp 7: Ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1ed1t gi\u00fap l\u00e0m ch\u1ee7 ki\u1ebfn th\u1ee9c<\/title>\n<meta name=\"description\" content=\"Ki\u00ea\u0301n th\u01b0\u0301c V\u00e2\u0323t ly\u0301 l\u1edbp 7 h\u01b0\u0301a he\u0323n r\u00e2\u0301t nhi\u00ea\u0300u \u0111i\u00ea\u0300u thu\u0301 vi\u0323. Cu\u0300ng Toppy kha\u0301m pha\u0301 t\u00e2\u0301t t\u00e2\u0300n t\u00e2\u0323t th\u00f4ng tin v\u00ea\u0300 V\u1eadt l\u00fd l\u1edbp 7 trong ba\u0300i vi\u00ea\u0301t.\u00a0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/teky.edu.vn\/blog\/vat-ly-lop-7\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"V\u1eadt l\u00fd l\u1edbp 7: Ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1ed1t gi\u00fap l\u00e0m ch\u1ee7 ki\u1ebfn th\u1ee9c\" \/>\n<meta property=\"og:description\" content=\"Ki\u00ea\u0301n th\u01b0\u0301c V\u00e2\u0323t ly\u0301 l\u1edbp 7 h\u01b0\u0301a he\u0323n r\u00e2\u0301t nhi\u00ea\u0300u \u0111i\u00ea\u0300u thu\u0301 vi\u0323. 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