Kh\u00f4ng kh\u00ed c\u00f3 \u00e1p su\u1ea5t. N\u1ebfu b\u1ea1n l\u1ea5y m\u1ed9t qu\u1ea3 b\u00f3ng, h\u00fat h\u1ebft kh\u00f4ng kh\u00ed b\u00ean trong th\u00ec qu\u1ea3 b\u00f3ng s\u1ebd x\u1eb9p xu\u1ed1ng, b\u1edfi v\u00ec b\u00ean trong \u0111\u00f3 kh\u00f4ng c\u00f2n kh\u00f4ng kh\u00ed n\u1eefa, b\u1ecb \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed b\u00ean ngo\u00e0i \u00e9p b\u1eb9p.<\/p>\n\n\n\n
T\u1eeb l\u00e2u ng\u01b0\u1eddi ta \u0111\u00e3 bi\u1ebft v\u1ec1 s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed. N\u0103m 1642 T \u00f4rixenli nh\u00e0 khoa h\u1ecdc Italia \u0111\u00e3 t\u1eebng l\u00e0m th\u00ed nghi\u1ec7m: l\u1ea5y m\u1ed9t \u1ed1ng thu\u1ef7 tinh d\u00e0i m\u1ed9t m\u00e9t m\u1ed9t \u0111\u1ea7u b\u1ecbt k\u00edn, c\u00f2n \u0111\u1ea7u kia \u0111\u1ed5 \u0111\u1ea7y thu\u1ef7 ng\u00e2n (\u0111\u1ea9y kh\u00f4ng kh\u00ed ra h\u1ebft), d\u00f9ng ng\u00f3n tay b\u1ecbt k\u00edn mi\u1ec7ng \u1ed1ng, sau \u0111\u00f3 d\u1ef1ng ng\u01b0\u1ee3c \u1ed1ng thu\u1ef7 tinh r\u1ed3i nh\u00fang v\u00e0o c\u1ed1c thu\u1ef7 ng\u00e2n. L\u00fac \u0111\u00f3 thu\u1ef7 ng\u00e2n trong \u1ed1ng h\u1ea1 xu\u1ed1ng, \u0111\u1ebfn \u0111\u1ed9 cao 760 mm th\u00ec ng\u1eebng l\u1ea1i. L\u1ef1c \u0111\u1ee1 c\u1ee7a thu\u1ef7 ng\u00e2n trong \u1ed1ng ch\u00ednh l\u00e0 \u00e1p su\u1ea5t c\u1ee7a b\u1ea7u kh\u00ed quy\u1ec3n. V\u1ec1 sau ng\u01b0\u1eddi ta c\u0103n c\u1ee9 nguy\u00ean l\u00fd n\u00e0y l\u00e0m ra c\u00e1c d\u1ea1ng \u0111\u1ed3ng h\u1ed3 \u0111o kh\u00ed \u00e1p. T h\u00f4ng qua \u0111\u1ed3ng h\u1ed3 \u0111o kh\u00ed \u00e1p l\u00e0 c\u00f3 th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c kh\u00ed \u00e1p l\u00fac t\u0103ng l\u00ean, l\u00fac gi\u1ea3m xu\u1ed1ng, thay \u0111\u1ed5i r\u1ea5t r\u00f5 r\u1ec7t.<\/p>\n\n\n\n
V\u00ec sao \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed l\u1ea1i thay \u0111\u1ed5i?<\/p>\n\n\n\n
Kh\u00f4ng kh\u00ed l\u00e0 ch\u1ea5t c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng. T rong kh\u00ed quy\u1ec3n b\u1ea5t c\u1ee9 v\u1eadt g\u00ec c\u0169ng \u0111\u1ec1u ch\u1ecbu \u00e1p su\u1ea5t c\u1ee7a kh\u00ed quy\u1ec3n. \u00c1p su\u1ea5t n\u00e0y b\u1eb1ng v\u1edbi \u00e1p su\u1ea5t do tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a c\u1ed9t kh\u00f4ng kh\u00ed n\u1eb1m b\u00ean tr\u00ean v\u1eadt \u0111\u00f3 g\u00e2y ra. \u00c1p su\u1ea5t kh\u00ed quy\u1ec3n c\u1ee7a m\u1ed9t v\u00f9ng n\u00e0o \u0111\u00f3 l\u00e0 \u00e1p su\u1ea5t do tr\u1ecdng l\u01b0\u1ee3ng c\u1ed9t kh\u00f4ng kh\u00ed th\u1eb3ng \u0111\u1ee9ng t\u1eeb m\u1eb7t \u0111\u1ea5t l\u00ean h\u1ebft t\u1ea7ng kh\u00ed quy\u1ec3n g\u00e2y ra. Ch\u1ec9 c\u1ea7n l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed trong c\u1ed9t kh\u00ed n\u00e0y gi\u1ea3m th\u1ea5p th\u00ec \u00e1p su\u1ea5t s\u1ebd gi\u1ea3m xu\u1ed1ng, l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed c\u1ee7a c\u1ed9t t\u0103ng l\u00ean th\u00ec \u00e1p su\u1ea5t s\u1ebd t\u0103ng l\u00ean. S\u1ef1 t\u0103ng hay gi\u1ea3m l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed trong c\u1ed9t kh\u00ed \u0111\u00f3 c\u00f3 li\u00ean quan v\u1edbi s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a kh\u00f4ng kh\u00ed. N\u1ebfu l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed \u0111i v\u00e0o c\u1ed9t kh\u00ed \u0111\u00f3 nhi\u1ec1u h\u01a1n l\u01b0\u1ee3ng \u0111i ra th\u00ec \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed t\u0103ng cao, n\u1ebfu l\u01b0\u1ee3ng \u0111i v\u00e0o \u00edt h\u01a1n \u0111i ra th\u00ec \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed gi\u1ea3m th\u1ea5p.<\/p>\n\n\n\n
Kh\u00f4ng nh\u1eefng \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed c\u00e1c v\u00f9ng tr\u00ean Tr\u00e1i \u0110\u1ea5t kh\u00f4ng gi\u1ed1ng nhau m\u00e0 ngay m\u1ed9t v\u00f9ng, \u00e1p su\u1ea5t h\u1eb1ng ng\u00e0y c\u0169ng lu\u00f4n lu\u00f4n bi\u1ebfn \u0111\u1ed5i. N\u00f3i chung bu\u1ed5i s\u00e1ng t\u1eeb 9 – 10 gi\u1edd \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed cao h\u01a1n m\u1ed9t ch\u00fat, bu\u1ed5i chi\u1ec1u 15 – 16 gi\u1edd th\u1ea5p h\u01a1n m\u1ed9t ch\u00fat, n\u1eeda \u0111\u1ea7u c\u1ee7a \u0111\u00eam t\u1eeb 21 – 22 gi\u1edd \u00e1p su\u1ea5t cao h\u01a1n, n\u1eeda sau c\u1ee7a \u0111\u00eam t\u1eeb 3 – 4 gi\u1edd s\u00e1ng \u00e1p su\u1ea5t th\u1ea5p h\u01a1n. \u0110\u00f3 ch\u00ednh l\u00e0 s\u1ef1 bi\u1ebfn \u0111\u1ed5i h\u1eb1ng ng\u00e0y c\u00f3 t\u00ednh chu k\u1ef3 c\u1ee7a \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed. Khi c\u00f3 gi\u00f3 l\u1ed1c ho\u1eb7c nh\u1eefng lu\u1ed3ng gi\u00f3 l\u1ea1nh tr\u00e0n \u0111\u1ebfn th\u00ec \u00e1p su\u1ea5t gi\u1ea3m th\u1ea5p ho\u1eb7c t\u0103ng cao r\u00f5 r\u1ec7t, \u0111\u00f3 l\u00e0 s\u1ef1 bi\u1ebfn \u0111\u1ed5i kh\u00f4ng c\u00f3 t\u00ednh chu k\u1ef3 c\u1ee7a \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed.<\/p>\n\n\n\n
T \u1eeb kho\u00e1: \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed bi\u1ebfn \u0111\u1ed5i.<\/p>\n","protected":false},"excerpt":{"rendered":"
Kh\u00f4ng kh\u00ed c\u00f3 \u00e1p su\u1ea5t. N\u1ebfu b\u1ea1n l\u1ea5y m\u1ed9t qu\u1ea3 b\u00f3ng, h\u00fat h\u1ebft kh\u00f4ng kh\u00ed b\u00ean trong th\u00ec qu\u1ea3 b\u00f3ng s\u1ebd x\u1eb9p xu\u1ed1ng, b\u1edfi v\u00ec b\u00ean trong \u0111\u00f3 kh\u00f4ng c\u00f2n kh\u00f4ng kh\u00ed n\u1eefa, b\u1ecb \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed b\u00ean ngo\u00e0i \u00e9p b\u1eb9p. T\u1eeb l\u00e2u ng\u01b0\u1eddi ta \u0111\u00e3 bi\u1ebft v\u1ec1 s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a \u00e1p su\u1ea5t […]<\/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":[15,19],"tags":[],"class_list":["post-10043","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tu-nhien"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10043","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=10043"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10043\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}