C\u00e1c con t\u00e0u v\u0169 tr\u1ee5 ch\u1edf ng\u01b0\u1eddi (nh\u01b0 tr\u1ea1m kh\u00f4ng gian, m\u00e1y bay v\u0169 tr\u1ee5 ho\u1eb7c con t\u00e0u v\u0169 tr\u1ee5) \u1edf \u0111\u00f3 c\u00f3 \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi m\u1eb7t \u0111\u1ea5t, v\u00ec v\u1eady c\u00e1c nh\u00e0 du h\u00e0nh kh\u00f4ng c\u00f3 c\u1ea3m gi\u00e1c m\u1ea5t tr\u1ecdng l\u01b0\u1ee3ng, sinh ho\u1ea1t c\u00f3 th\u1ec3 kh\u00f4ng kh\u00e1c bao nhi\u00eau so v\u1edbi m\u1eb7t \u0111\u1ea5t, th\u1eadm ch\u00ed c\u00f3 th\u1ec3 m\u1eb7c th\u01b0\u1eddng ph\u1ee5c.<\/p>\n\n\n\n
Nh\u01b0ng n\u1ebfu c\u00e1c nh\u00e0 du h\u00e0nh ph\u1ea3i ra ngo\u00e0i v\u0169 tr\u1ee5 \u0111\u1ec3 ho\u00e0n th\u00e0nh nhi\u1ec7m v\u1ee5 n\u00e0o \u0111\u00f3, t\u1ee9c l\u00e0 l\u00e0m vi\u1ec7c ngo\u00e0i khoang t\u00e0u th\u00ec ph\u1ea3i m\u1eb7c trang ph\u1ee5c v\u0169 tr\u1ee5 \u0111\u1eb7c bi\u1ec7t v\u00e0 tr\u01b0\u1edbc khi ra kh\u1ecfi khoang t\u00e0u ph\u1ea3i th\u1edf oxy ba ti\u1ebfng \u0111\u1ed3ng h\u1ed3 \u0111\u1ec3 tr\u00e1nh nh\u1eefng lo\u1ea1i b\u1ec7nh do gi\u1ea3m \u00e1p trong v\u0169 tr\u1ee5 g\u00e2y ra.<\/p>\n\n\n\n
Th\u1ebf n\u00e0o l\u00e0 b\u1ec7nh gi\u1ea3m \u00e1p? V\u00ec sao th\u1edf oxy c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba b\u1ec7nh gi\u1ea3m \u00e1p?<\/p>\n\n\n\n
Ta h\u00e3y xem s\u1ef1 bi\u1ebfn \u0111\u1ed5i sau khi c\u00e1c nh\u00e0 du h\u00e0nh v\u0169 tr\u1ee5 ra kh\u1ecfi khoang t\u00e0u. \u1ede trong khoang t\u00e0u \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed \u0111\u01b0\u1ee3c duy tr\u00ec t\u01b0\u01a1ng t\u1ef1 tr\u00ean m\u1eb7t \u0111\u1ea5t, t\u1ee9c m\u1ed7i cm2 ch\u1ecbu \u00e1p l\u1ef1c 9,8 niut\u01a1n. Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u01a1 th\u1ec3 c\u1ee7a ng\u01b0\u1eddi l\u1edbn kho\u1ea3ng 2 m2, nh\u01b0 v\u1eady \u00e1p l\u1ef1c c\u01a1 th\u1ec3 ph\u1ea3i ch\u1ecbu kho\u1ea3ng 196000 niut\u01a1n. Nh\u01b0ng khi \u1edf tr\u00ean m\u1eb7t \u0111\u1ea5t ta kh\u00f4ng c\u1ea3m th\u1ea5y c\u00f3 \u00e1p l\u1ef1c, \u0111\u00f3 l\u00e0 v\u00ec \u00e1p su\u1ea5t trong c\u01a1 th\u1ec3 c\u00e2n b\u1eb1ng v\u1edbi n\u00f3. N\u1ebfu \u00e1p su\u1ea5t b\u00ean ngo\u00e0i gi\u1ea3m th\u1ea5p th\u00ec c\u00e1c t\u1ed5 ch\u1ee9c v\u00e0 c\u00e1c ch\u1ea5t kh\u00ed tan trong d\u1ecbch th\u1ec3 c\u1ee7a con ng\u01b0\u1eddi (ch\u1ee7 y\u1ebfu l\u00e0 kh\u00ed nit\u01a1) s\u1ebd chuy\u1ec3n ho\u00e1 th\u00e0nh nh\u1eefng b\u1ecdt kh\u00ed l\u00e0m t\u1eafc m\u1ea1ch m\u00e1u, g\u00e2y \u00e1p su\u1ea5t c\u1ee5c b\u1ed9 l\u00ean c\u00e1c t\u1ed5 ch\u1ee9c l\u00e0m cho t\u1ee9 chi \u0111au nh\u1ee9c, m\u1eb7t xanh x\u00e1m, ra m\u1ed3 h\u00f4i, th\u1edf kh\u00f3 kh\u0103n v\u00e0 th\u00ednh gi\u00e1c m\u1ea5t \u0111i. \u0110\u00f3 g\u1ecdi l\u00e0 b\u1ec7nh gi\u1ea3m \u00e1p, ph\u1ea3n \u1ee9ng c\u1ee7a n\u00f3 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c ch\u1ee9ng l\u00fac leo n\u00fai cao.<\/p>\n\n\n\n
Tuy c\u00e1c nh\u00e0 v\u0169 tr\u1ee5 khi ra ngo\u00e0i v\u0169 tr\u1ee5 \u0111\u00e3 m\u1eb7c trang ph\u1ee5c v\u0169 tr\u1ee5, trong trang ph\u1ee5c \u0111\u00e3 b\u1ea3o \u0111\u1ea3m m\u1ed9t kh\u00ed \u00e1p nh\u1ea5t \u0111\u1ecbnh, nh\u01b0ng v\u00ec tr\u00ecnh \u0111\u1ed9 k\u1ef9 thu\u1eadt hi\u1ec7n nay c\u00f2n b\u1ecb h\u1ea1n ch\u1ebf n\u00ean kh\u00ed \u00e1p n\u00e0y ch\u01b0a \u0111\u1ee7 \u0111\u1ec3 b\u1ea3o \u0111\u1ea3m nh\u01b0 trong khoang t\u00e0u m\u00e0 ch\u1ec9 m\u1edbi \u0111\u1ea1t m\u1ee9c 1\/3 (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0111\u1ed9 cao 9-10 km trong kh\u00ed quy\u1ec3n). Th\u00ed nghi\u1ec7m tr\u00ean m\u1eb7t \u0111\u1ea5t ch\u1ee9ng t\u1ecf t\u1eeb \u0111\u1ed9 cao 8 km tr\u1edf l\u00ean con ng\u01b0\u1eddi c\u00f3 th\u1ec3 m\u1eafc b\u1ec7nh gi\u1ea3m \u00e1p, do \u0111\u00f3 c\u00e1c nh\u00e0 du h\u00e0nh tr\u01b0\u1edbc khi ra kh\u1ecfi con t\u00e0u \u0111\u1ec1u ph\u1ea3i th\u1edf kh\u00ed oxy \u0111\u1ec3 khi\u1ebfn cho kh\u00ed nit\u01a1 trong c\u00e1c t\u1ed5 ch\u1ee9c v\u00e0 d\u1ecbch th\u1ec3 b\u00e0i ti\u1ebft ra h\u1ebft, nh\u1eb1m tr\u00e1nh b\u1ec7nh gi\u1ea3m \u00e1p ph\u00e1t sinh, t\u1eeb \u0111\u00f3 m\u00e0 h\u1ecd c\u00f3 th\u1ec3 ho\u00e0n th\u00e0nh thu\u1eadn l\u1ee3i nh\u1eefng c\u00f4ng vi\u1ec7c b\u00ean ngo\u00e0i con t\u00e0u.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: B\u1ec7nh gi\u1ea3m \u00e1p; L\u00e0m vi\u1ec7c ngo\u00e0i v\u0169<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00e1c con t\u00e0u v\u0169 tr\u1ee5 ch\u1edf ng\u01b0\u1eddi (nh\u01b0 tr\u1ea1m kh\u00f4ng gian, m\u00e1y bay v\u0169 tr\u1ee5 ho\u1eb7c con t\u00e0u v\u0169 tr\u1ee5) \u1edf \u0111\u00f3 c\u00f3 \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi m\u1eb7t \u0111\u1ea5t, v\u00ec v\u1eady c\u00e1c nh\u00e0 du h\u00e0nh kh\u00f4ng c\u00f3 c\u1ea3m gi\u00e1c m\u1ea5t tr\u1ecdng l\u01b0\u1ee3ng, sinh ho\u1ea1t c\u00f3 th\u1ec3 kh\u00f4ng kh\u00e1c bao nhi\u00eau so v\u1edbi […]<\/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-7399","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\/7399","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=7399"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7399\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7399"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}