Nhi\u1ec7t k\u1ebf l\u00e0 kh\u00ed c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9. Nhi\u1ec7t k\u1ebf th\u01b0\u1eddng d\u00f9ng c\u00f3: nhi\u1ec7t k\u1ebf thu\u1ef7 ng\u00e2n v\u00e0 nhi\u1ec7t k\u1ebf r\u01b0\u1ee3u. Thu\u1ef7 ng\u00e2n v\u00e0 r\u01b0\u1ee3u l\u00e0 ph\u1ea7n ch\u1ee7 y\u1ebfu \u0111\u1ec3 t\u1ea1o th\u00e0nh nhi\u1ec7t k\u1ebf, g\u1ecdi l\u00e0 ch\u1ea5t \u0111o nhi\u1ec7t. Ch\u1ea5t \u0111o nhi\u1ec7t c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 l\u00e0 v\u00ec n\u00f3 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m n\u00f3ng n\u1edf l\u1ea1nh co. Theo \u0111\u00e0 nhi\u1ec7t \u0111\u1ed9 l\u00ean cao, th\u1ec3 t\u00edch c\u1ee7a thu\u1ef7 ng\u00e2n v\u00e0 r\u01b0\u1ee3u s\u1ebd gi\u00e3n n\u1edf r\u00f5 r\u1ec7t. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft trong nhi\u1ec7t k\u1ebf l\u00e0 chi\u1ec1u cao c\u1ee7a c\u1ed9t thu\u1ef7 ng\u00e2n ho\u1eb7c c\u1ed9t r\u01b0\u1ee3u t\u0103ng l\u00ean. Nh\u01b0 v\u1eady, ch\u1ec9 c\u1ea7n kh\u1eafc l\u00ean nh\u1eefng \u0111\u1ed9 kh\u1eafc th\u00edch h\u1ee3p th\u00ec ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 \u0111\u1ecdc ra nhi\u1ec7t \u0111\u1ed9 t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n
\u0110\u1ec3 cho nhi\u1ec7t k\u1ebf c\u00f3 gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng c\u00e0ng l\u1edbn, v\u1eadt ch\u1ea5t \u0111o nhi\u1ec7t c\u1ea7n ph\u1ea3i c\u00f3 hai \u0111\u1eb7c t\u00ednh l\u1edbn: m\u1ed9t l\u00e0, s\u1ef1 bi\u1ebfn \u0111\u1ed5i th\u1ec3 t\u00edch c\u1ee7a ch\u1ea5t \u0111o nhi\u1ec7t theo s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 ph\u1ea3i r\u1ea5t nh\u1ea1y, sao cho c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 r\u1ea5t nh\u1ecf; hai l\u00e0, khi \u0111o nhi\u1ec7t \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, ch\u1ea5t \u0111o nhi\u1ec7t kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00f4ng l\u1ea1i th\u00e0nh ch\u1ea5t r\u1eafn; ng\u01b0\u1ee3c l\u1ea1i, \u1edf nhi\u1ec7t \u0111\u1ed9 cao, ch\u1ea5t \u0111o nhi\u1ec7t c\u0169ng kh\u00f4ng \u0111\u01b0\u1ee3c bi\u1ebfn th\u00e0nh ch\u1ea5t kh\u00ed. N\u1ebfu kh\u00f4ng th\u1ebf th\u00ec kh\u00f4ng th\u1ec3 n\u00e0o d\u00f9ng n\u00f3 \u0111\u1ec3 \u0111o nhi\u1ec7t.<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi thu\u1ef7 ng\u00e2n v\u00e0 r\u01b0\u1ee3u c\u00f3 c\u00f9ng kh\u1ed1i l\u01b0\u1ee3ng, n\u1ebfu l\u1ea7n l\u01b0\u1ee3t l\u00e0m cho nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u00fang t\u0103ng l\u00ean 1\u00b0C, qua th\u1ef1c nghi\u1ec7m ph\u00e1t hi\u1ec7n, nhi\u1ec7t l\u01b0\u1ee3ng h\u1ea5p thu c\u1ee7a r\u01b0\u1ee3u l\u1edbn h\u01a1n c\u1ee7a thu\u1ef7 ng\u00e2n r\u1ea5t nhi\u1ec1u, g\u1ea5p kho\u1ea3ng 20 l\u1ea7n. V\u00ec v\u1eady, \u0111\u1ed9 nh\u1ea1y c\u1ee7a s\u1ef1 bi\u1ebfn \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u1ed9t thu\u1ef7 ng\u00e2n trong nhi\u1ec7t k\u1ebf thu\u1ef7 ng\u00e2n l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi c\u1ed9t r\u01b0\u1ee3u trong nhi\u1ec7t k\u1ebf r\u01b0\u1ee3u. Trong c\u00f4ng vi\u1ec7c th\u1ef1c nghi\u1ec7m khoa h\u1ecdc ho\u1eb7c \u0111o nhi\u1ec7t \u0111\u1ed9 c\u01a1 th\u1ec3 ng\u01b0\u1eddi, \u0111o nhi\u1ec7t l\u01b0\u1ee3ng h\u1ea5p thu ho\u1eb7c gi\u1ea3i ph\u00f3ng ra c\u1ee7a nhi\u1ec7t k\u1ebf r\u1ea5t nh\u1ecf, song l\u1ea1i ph\u1ea3i th\u1ec3 hi\u1ec7n ra s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a nhi\u1ec7t \u0111\u1ed9 n\u00ean n\u00f3i chung \u0111\u1ec1u d\u00f9ng nhi\u1ec7t k\u1ebf thu\u1ef7 ng\u00e2n. C\u00f2n v\u1edbi s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 nh\u01b0 nhau, r\u01b0\u1ee3u h\u1ea5p thu nhi\u1ec1u nhi\u1ec7t l\u01b0\u1ee3ng, kh\u1ea3 n\u0103ng gi\u00e3n n\u1edf l\u1edbn, cho n\u00ean s\u1ef1 bi\u1ebfn \u0111\u1ed5i l\u00ean xu\u1ed1ng c\u1ee7a c\u1ed9t r\u01b0\u1ee3u r\u00f5 r\u1ec7t h\u01a1n nhi\u1ec1u so v\u1edbi c\u1ed9t thu\u1ef7 ng\u00e2n. Khi \u0111o nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed xung quanh v\u00e0 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc, n\u00f3i chung th\u01b0\u1eddng d\u00f9ng nhi\u1ec7t k\u1ebf r\u01b0\u1ee3u.<\/p>\n\n\n\n
R\u01b0\u1ee3u v\u00e0 thu\u1ef7 ng\u00e2n c\u00f2n c\u00f3 \u0111\u1eb7c t\u00ednh kh\u00e1c nhau: r\u01b0\u1ee3u “ch\u1ecbu l\u1ea1nh” r\u1ea5t t\u1ed1t, \u1edf nhi\u1ec7t \u0111\u1ed9 \u2013117\u00b0C n\u00f3 m\u1edbi \u0111\u00f4ng l\u1ea1i th\u00e0nh ch\u1ea5t r\u1eafn, c\u00f2n thu\u1ef7 ng\u00e2n \u1edf nhi\u1ec7t \u0111\u1ed9 \u2013 31\u00b0C \u0111\u00e3 \u0111\u00f4ng c\u1ee9ng l\u1ea1i, m\u1ea5t \u0111i t\u00ednh l\u01b0u \u0111\u1ed9ng. \u1ede nh\u1eefng x\u1ee9 l\u1ea1nh, nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed m\u00f9a \u0111\u00f4ng xu\u1ed1ng x\u1ea5p x\u1ec9 \u201340\u00b0C, v\u00ec v\u1eady, n\u00f3i chung d\u00f9ng nhi\u1ec7t k\u1ebf r\u01b0\u1ee3u \u0111o nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed th\u00ec th\u00edch h\u1ee3p. Song thu\u1ef7 ng\u00e2n c\u0169ng c\u00f3 m\u1ed9t \u01b0u \u0111i\u1ec3m: n\u00f3 “ch\u1ecbu n\u00f3ng” kh\u00e1 h\u01a1n r\u01b0\u1ee3u. \u0110i\u1ec3m s\u00f4i c\u1ee7a thu\u1ef7 ng\u00e2n l\u00e0 356,72\u00b0C; c\u00f2n r\u01b0\u1ee3u khi \u0111\u1ebfn 78,3\u00b0C th\u00ec s\u1ebd s\u00f4i v\u00e0 nhanh ch\u00f3ng ho\u00e1 h\u01a1i. Trong tr\u01b0\u1eddng h\u1ee3p \u0111o nhi\u1ec7t \u0111\u1ed9 cao, r\u00f5 r\u00e0ng l\u00e0 nhi\u1ec7t k\u1ebf thu\u1ef7 ng\u00e2n c\u00f3 t\u00e1c d\u1ee5ng \u0111o nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c h\u01a1n nhi\u1ec7t k\u1ebf r\u01b0\u1ee3u.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Nhi\u1ec7t k\u1ebf; V\u1eadt ch\u1ea5t \u0111o nhi\u1ec7t; N\u00f3ng n\u1edf l\u1ea1nh co; Thu\u1ef7 ng\u00e2n; r\u01b0\u1ee3u; \u0110i\u1ec3m \u0111\u00f4ng c\u1ee9ng; \u0110i\u1ec3m s\u00f4i.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Nhi\u1ec7t k\u1ebf l\u00e0 kh\u00ed c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9. Nhi\u1ec7t k\u1ebf th\u01b0\u1eddng d\u00f9ng c\u00f3: nhi\u1ec7t k\u1ebf thu\u1ef7 ng\u00e2n v\u00e0 nhi\u1ec7t k\u1ebf r\u01b0\u1ee3u. Thu\u1ef7 ng\u00e2n v\u00e0 r\u01b0\u1ee3u l\u00e0 ph\u1ea7n ch\u1ee7 y\u1ebfu \u0111\u1ec3 t\u1ea1o th\u00e0nh nhi\u1ec7t k\u1ebf, g\u1ecdi l\u00e0 ch\u1ea5t \u0111o nhi\u1ec7t. Ch\u1ea5t \u0111o nhi\u1ec7t c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 l\u00e0 v\u00ec n\u00f3 c\u00f3 […]<\/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":[15,7],"tags":[],"class_list":["post-5646","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5646","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=5646"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5646\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5646"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5646"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5646"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}