\u0110\u01a1n v\u1ecb \u0111o th\u1eddi gian l\u00e0 gi\u1edd, \u0111\u01a1n v\u1ecb \u0111o g\u00f3c l\u00e0 \u0111\u1ed9, nh\u00ecn b\u1ec1 ngo\u00e0i ch\u00fang kh\u00f4ng h\u1ec1 c\u00f3 m\u1ed1i li\u00ean quan g\u00ec v\u1edbi nhau. Th\u1ebf t\u1ea1i sao ch\u00fang l\u1ea1i \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c \u0111\u01a1n v\u1ecb nh\u1ecf c\u00f3 t\u00ean g\u1ecdi gi\u1ed1ng nhau l\u00e0 ph\u00fat v\u00e0 gi\u00e2y? T\u1ea1i sao ch\u00fang l\u1ea1i s\u1eed d\u1ee5ng c\u00f9ng h\u1ec7 \u0111\u1ebfm c\u01a1 s\u1ed1 60?<\/p>\n\n\n\n
Nghi\u00ean c\u1eefu k\u0129 h\u01a1n m\u1ed9t ch\u00fat ta s\u1ebd th\u1ea5y hai lo\u1ea1i \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng n\u00e0y qu\u1ea3 c\u00f3 m\u1ed1i li\u00ean h\u1ec7 h\u1ebft s\u1ee9c m\u1eadt thi\u1ebft v\u1edbi nhau. Ngay t\u1eeb th\u1eddi c\u1ed5 \u0111\u1ea1i, do nhu c\u1ea7u c\u1ee7a lao \u0111\u1ed9ng s\u1ea3n xu\u1ea5t, con ng\u01b0\u1eddi ph\u1ea3i nghi\u00ean c\u1ee9u thi\u00ean v\u0103n v\u00e0 \u0111\u1eb7t ra l\u1ecbch ph\u00e1p v\u00e0 v\u00ec v\u1eady c\u00f3 s\u1ef1 \u0111\u1ee5ng ch\u1ea1m t\u1ef1 nhi\u00ean v\u1edbi vi\u1ec7c \u0111o g\u00f3c v\u00e0 \u0111o th\u1eddi gian. Khi nghi\u00ean c\u1ee9u s\u1ef1 thay \u0111\u1ed5i \u0111\u00eam ng\u00e0y, ng\u01b0\u1eddi ta ph\u1ea3i quan s\u00e1t s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng t\u1ef1 quay c\u1ee7a Tr\u00e1i \u0110\u1ea5t. V\u00e0 r\u00f5 r\u00e0ng g\u00f3c c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng t\u1ef1 quay v\u00e0 th\u1eddi gian l\u00e0 c\u00f3 li\u00ean quan m\u1eadt thi\u1ebft v\u1edbi nhau. V\u00ec trong l\u1ecbch ph\u00e1p ng\u01b0\u1eddi ta c\u1ea7n \u0111\u1ed9 ch\u00ednh x\u00e1c r\u1ea5t cao trong khi \u0111\u00f3 \u0111\u01a1n v\u1ecb \u0111o \u201cgi\u1edd\u201d v\u00e0 \u0111\u01a1n v\u1ecb \u0111o \u201c\u0111\u1ed9\u201d l\u00e0 r\u1ea5t l\u1edbn n\u00ean c\u1ea7n ph\u1ea3i t\u00ecm c\u00e1c \u0111\u01a1n v\u1ecb \u0111o nh\u1ecf h\u01a1n. C\u00e1c \u0111\u01a1n v\u1ecb nh\u1ecf h\u01a1n \u0111\u1ec3 \u0111o th\u1eddi gian v\u00e0 g\u00f3c ph\u1ea3i c\u00f3 t\u00ednh ch\u1ea5t chung l\u00e0: \u0110\u01a1n v\u1ecb nh\u1ecf n\u00e0y ph\u1ea3i c\u00f3 b\u1ed9i s\u1ed1 l\u00e0 1\/2,1\/3,1\/4,1\/5,1\/6 . N\u1ebfu l\u1ea5y 1\/60 l\u00e0m \u0111\u01a1n v\u1ecb th\u00ec ho\u00e0n to\u00e0n \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u00f3. V\u00ed d\u1ee5 1\/2 ch\u00ednh l\u00e0 30 l\u1ea7n c\u1ee7a 1\/60 ,1\/3 l\u00e0 20 l\u1ea7n c\u1ee7a 1\/60 ,1\/4 l\u00e0 15 l\u1ea7n c\u1ee7a 1\/60 \u2026<\/p>\n\n\n\n
Trong to\u00e1n h\u1ecdc, ng\u01b0\u1eddi ta ch\u1ecdn \u0111\u01a1n v\u1ecb 1\/60 g\u1ecdi l\u00e0 \u201cph\u00fat\u201d v\u00e0 k\u00ed hi\u1ec7u \u201c,\u201d (d\u00f9ng cho \u0111o g\u00f3c) v\u00e0 ph ho\u1eb7c min (d\u00f9ng cho \u0111o th\u1eddi gian) v\u00e0 d\u00f9ng \u0111\u01a1n v\u1ecb 1\/60 c\u1ee7a ph\u00fat l\u00e0 \u201cgi\u00e2y\u201d, k\u00ed hi\u1ec7u \u201c,,\u201d (d\u00f9ng cho \u0111o g\u00f3c) v\u00e0 s (d\u00f9ng cho \u0111o th\u1eddi gian). Th\u1eddi gian v\u00e0 g\u00f3c \u0111\u1ec1u l\u1ea5y ph\u00fat v\u00e0 gi\u00e2y l\u00e0m c\u00e1c \u0111\u01a1n v\u1ecb nh\u1ecf l\u00e0 v\u00ec th\u1ebf.<\/p>\n\n\n\n
D\u00f9ng c\u00e1c \u0111\u01a1n v\u1ecb h\u1ec7 \u0111\u1ebfm c\u01a1 s\u1ed1 60 trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p c\u0169ng c\u00f3 nhi\u1ec1u thu\u1eadn l\u1ee3i. V\u00ed d\u1ee5 s\u1ed1 1\/3 n\u1ebfu d\u00f9ng h\u1ec7 \u0111\u1ebfm th\u1eadp ph\u00e2n th\u00ec ph\u1ea3i bi\u1ec3u di\u1ec5n th\u00e0nh m\u1ed9t s\u1ed1 l\u1ebb v\u00f4 h\u1ea1n, trong khi d\u00f9ng h\u1ec7 \u0111\u1ebfm c\u01a1 s\u1ed1 60 th\u00ec \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t s\u1ed1 nguy\u00ean.<\/p>\n\n\n\n
H\u1ec7 \u0111\u1ebfm c\u01a1 s\u1ed1 60 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 khoa h\u1ecdc tr\u00ean th\u1ebf gi\u1edbi d\u00f9ng trong thi\u00ean v\u0103n v\u00e0 l\u1ecbch ph\u00e1p v\u00e0 c\u00f2n \u0111\u01b0\u1ee3c duy tr\u00ec cho \u0111\u1ebfn ng\u00e0y nay.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: \u0110o th\u1eddi gian; \u0110o g\u00f3c; H\u1ec7 \u0111\u1ebfm c\u01a1 s\u1ed1 60.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
\u0110\u01a1n v\u1ecb \u0111o th\u1eddi gian l\u00e0 gi\u1edd, \u0111\u01a1n v\u1ecb \u0111o g\u00f3c l\u00e0 \u0111\u1ed9, nh\u00ecn b\u1ec1 ngo\u00e0i ch\u00fang kh\u00f4ng h\u1ec1 c\u00f3 m\u1ed1i li\u00ean quan g\u00ec v\u1edbi nhau. Th\u1ebf t\u1ea1i sao ch\u00fang l\u1ea1i \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c \u0111\u01a1n v\u1ecb nh\u1ecf c\u00f3 t\u00ean g\u1ecdi gi\u1ed1ng nhau l\u00e0 ph\u00fat v\u00e0 gi\u00e2y? T\u1ea1i sao ch\u00fang l\u1ea1i s\u1eed d\u1ee5ng c\u00f9ng h\u1ec7 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,9],"tags":[],"class_list":["post-7485","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7485","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=7485"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7485\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7485"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}