T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 5 – Arkady Leokum<\/p>\n\n\n\n
Keo hay h\u1ed3 (d\u00e1n) l\u00e0 ch\u1ea5t li\u1ec7u l\u00e0m cho hai v\u1eadt d\u00ednh ch\u1eb7t v\u00e0o nhau. C\u00e1i \u00fd t\u01b0\u1edfng d\u00e1n v\u1eadt n\u1ecd d\u00ednh v\u00e0o v\u1eadt kia ch\u1eb3ng ph\u1ea3i l\u00e0 m\u1edbi m\u1ebb g\u00ec n\u1ebfu kh\u00f4ng mu\u1ed1n n\u00f3i l\u00e0 n\u00f3 \u201cx\u01b0a nh\u01b0 tr\u00e1i \u0111\u1ea5t\u201d. Tr\u00ean m\u1ed9t b\u1ee9c t\u01b0\u1eddng trong ng\u00f4i m\u1ed9 c\u1ed5 Ai C\u1eadp c\u00e1ch \u0111\u00e2y 3.000 n\u0103m \u0111\u00e3 c\u00f3 h\u00ecnh v\u1ebd ng\u01b0\u1eddi ta \u0111ang s\u1eed d\u1ee5ng keo d\u00e1n.<\/p>\n\n\n\n
Keo hay h\u1ed3 c\u00f3 th\u1ec3 do nhi\u1ec1u ch\u1ea5t li\u1ec7u kh\u00e1c nhau t\u1ea1o ra. Ch\u1eb3ng h\u1ea1n, c\u00f3 h\u1ed3 \u201ckho\u00e1ng\u201d do ch\u1ea5t kho\u00e1ng, h\u1ed3 \u201cth\u1ea3o m\u1ed9c\u201d do nh\u1ef1a, h\u1ea1t th\u1ea3o m\u1ed9c v\u00e0 h\u1ed3 \u201ct\u1ed5ng h\u1ee3p\u201d do h\u00f3a ch\u1ea5t. Nh\u01b0ng h\u1ed3 \u201ctruy\u1ec1n th\u1ed1ng\u201d v\u1eabn l\u00e0 h\u1ed3 l\u00e0m b\u1eb1ng x\u01b0\u01a1ng, g\u00e2n v\u00e0 da (th\u00fa). T\u1ea5t nhi\u00ean nh\u1eefng nguy\u00ean li\u1ec7u n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ebf bi\u1ebfn \u0111\u1eb7c bi\u1ec7t nh\u01b0 n\u1ea5u cho ch\u1ea3y ra, th\u00eam c\u00e1c ph\u1ee5 gia v\u00e0 dung d\u1ecbch. B\u1ea1n \u0111\u00e3 \u0103n \u201cth\u1ecbt \u0111\u00f4ng\u201d bao gi\u1edd ch\u01b0a? Trong n\u1ed3i th\u1ecbt \u0111\u00f4ng, b\u1ea1n th\u1ea5y ch\u1ea5t m\u1ee1 \u0111\u1eb7c tr\u1eafng \u0111\u1ee5c nh\u01b0 mi\u1ebfng xu xoa (th\u1ea1ch), th\u00ec \u0111\u00f3, m\u1ed9t d\u1ea1ng keo \u0111\u1ea5y. S\u1ea3n xu\u1ea5t th\u01b0\u01a1ng m\u00e3i, dung d\u1ecbch h\u1ee3p ch\u1ea5t k\u1ec3 tr\u00ean ph\u1ea3i \u0111\u01b0\u1ee3c \u0111un cho ch\u1ea3y l\u1ecfng ra r\u1ed3i l\u1ecdc th\u1eadt k\u1ef9 v\u00e0 \u0111\u1ec3 b\u1ed1c h\u01a1i cho \u201cc\u00f4\u201d l\u1ea1i. C\u00e1ch l\u00e0m \u201ca dao\u201d c\u0169ng t\u01b0\u01a1ng t\u1ef1, ch\u1ec9 kh\u00e1c l\u00e0 c\u00f4 \u0111\u1eb7c h\u01a1n sau \u0111\u00f3 d\u00e0n m\u1ecfng ra v\u00e0 \u0111em hong h\u01a1i n\u00f3ng trong nh\u1eefng \u1ed1ng h\u01a1i.<\/p>\n\n\n\n
Trong c\u00e1c c\u00f4ng ngh\u1ec7, keo \u0111\u01b0\u1ee3c d\u00f9ng trong nhi\u1ec1u c\u00f4ng vi\u1ec7c kh\u00e1c nhau, nh\u1ea5t l\u00e0 trong ch\u1ebf bi\u1ebfn \u0111\u1ed3 g\u1ed7, ch\u1ebf t\u1ea1o nh\u1ea1c c\u1ee5 nh\u01b0 \u0111\u00e0n ghita, \u0111\u00e0n d\u01b0\u01a1ng c\u1ea7m, nh\u1ea5t l\u00e0 l\u00e0m c\u00e1c h\u1ed9p gi\u1ea5y, \u0111\u00f3ng s\u00e1ch. Ph\u1ea3i k\u1ec3 t\u1edbi vi\u1ec7c l\u00e0m gi\u1ea5y carton d\u1ee3n s\u00f3ng \u0111\u1ec3 l\u00e0m th\u00f9ng \u0111\u1ef1ng tivi, cassette. L\u00e0m ph\u00e1o b\u00f4ng v\u00e0 di\u00eam qu\u1eb9t cho \u0111\u1ebfn l\u00e0m b\u00fap b\u00ea, c\u0169ng c\u1ea7n \u0111\u1ebfn keo d\u00e1n.<\/p>\n\n\n\n
C\u1ea7m t\u1edd gi\u1ea5y b\u1ea1c m\u1edbi, l\u1eafc l\u1eafc, b\u1ea1n nghe th\u1ea5y ti\u1ebfng \u201cl\u1ea1ch x\u1ea1ch\u201d. Ti\u1ebfng \u1ea5y l\u00e0 do m\u1ed9t th\u1ee9 h\u1ed3 r\u1ea5t \u0111\u1eb7c bi\u1ec7t d\u00f9ng \u0111\u1ec3 d\u00e1n hai m\u1eb7t t\u1edd gi\u1ea5y b\u1ea1c l\u1ea1i. B\u1ea1n \u0111\u00e3 tr\u00f4ng th\u1ea5y t\u1edd gi\u1ea5y nh\u00e1m r\u1ed3i ch\u1edb? Nh\u1eefng h\u1ea1t c\u00e1t \u0111\u00e3 \u0111\u01b0\u1ee3c \u201cd\u00e1n\u201d tr\u00ean gi\u1ea5y, t\u1ea5t nhi\u00ean ph\u1ea3i l\u00e0 lo\u1ea1i c\u00e1t \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 l\u00e0m gi\u1ea5y nh\u00e1m.<\/p>\n\n\n\n
Keo, h\u1ed3 l\u00e0m b\u1eb1ng ch\u1ea5t li\u1ec7u li\u1ec7u t\u1ef1 nhi\u00ean th\u00ec d\u1ec5 h\u01b0, do \u0111\u00f3, v\u1eadt d\u00e1n b\u1ecb bong, b\u1ecb r\u1eddi nhau ra. B\u1edfi v\u1eady, mu\u1ed1n c\u00f3 keo, h\u1ed3 t\u1ed1t ph\u1ea3i c\u00f3 nh\u1eefng ch\u1ea5t ph\u1ee5 gia \u0111\u1eb7c bi\u1ec7t. H\u1ed3 a dao – nh\u1ea5t l\u00e0 khi \u0111ang n\u1ea5u – th\u01b0\u1eddng t\u1ecfa ra m\u00f9i h\u00f4i th\u1ed1i ho\u1eb7c \u00edt n\u1eefa th\u00ec c\u0169ng c\u00f3 m\u00f9i \u1ea9m m\u1ed1c.<\/p>\n\n\n\n
Bu-m\u01a1-r\u0103ng, v\u0169 kh\u00ed th\u00f4 s\u01a1 m\u00e0 k\u00ec di\u1ec7u!<\/p>\n\n\n\n
M\u1ed9t trong nh\u1eefng v\u0169 kh\u00ed c\u1ed5 x\u01b0a v\u00e0 \u0111\u1ed9c \u0111\u00e1o nh\u1ea5t do con ng\u01b0\u1eddi ch\u1ebf t\u1ea1o ra l\u00e0 c\u00e1i \u201cbu-m\u01a1-r\u0103ng\u201d. T\u00ean g\u1ecdi c\u1ee7a v\u0169 kh\u00ed n\u00e0y l\u00e0 ti\u1ebfng c\u1ee7a m\u1ed9t b\u1ed9 l\u1ea1c th\u1ed5 d\u00e2n sinh s\u1ed1ng \u1edf v\u00f9ng \u0111\u1ea5t n\u1eb1m trong bang New South Wales, n\u01b0\u1edbc \u00dac.<\/p>\n\n\n\n
C\u00e1i v\u0169 kh\u00ed r\u1ea5t th\u00f4 s\u01a1 do m\u1ed9t b\u1ed9 l\u1ea1c c\u00f2n trong t\u00ecnh tr\u1ea1ng s\u01a1 khai ch\u1ebf t\u1ea1o ra t\u1eeb thu\u1edf n\u00e0o ch\u1eb3ng ai bi\u1ebft. V\u1eady m\u00e0 n\u00f3 \u0111\u00e3 l\u00e0m cho c\u00e1c nh\u00e0 khoa h\u1ecdc b\u1ed1i r\u1ed1i kh\u00f4ng \u00edt. Kh\u00f4ng c\u00f3 ai gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c th\u1ecfa \u0111\u00e1ng t\u1ea1i sao khi li\u1ec7ng n\u00f3 \u0111i, n\u00f3 bay trong kh\u00f4ng kh\u00ed r\u1ed3i l\u1ea1i t\u1ef1 n\u00f3 c\u00f3 th\u1ec3 v\u00f2ng tr\u1edf l\u1ea1i ch\u1ed7 ng\u01b0\u1eddi n\u00e9m. V\u00e0 v\u0169 kh\u00ed n\u00e0y \u0111\u01b0\u1ee3c th\u1ea5y s\u1eed d\u1ee5ng \u1edf ba \u0111\u1ecba ph\u01b0\u01a1ng m\u00e0 \u1edf v\u00e0o th\u1eddi \u0111\u1ea1i giao th\u01b0\u01a1ng h\u00e0ng h\u1ea3i l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n \u0111\u1ed9c nh\u1ea5t th\u00ec c\u0169ng kh\u00f3 m\u00e0 c\u00e1c b\u1ed9 l\u1ea1c \u1ea5y c\u00f3 th\u1ec3 \u201cd\u1ea1y\u201d cho nhau \u0111\u01b0\u1ee3c. \u0111\u00f3 l\u00e0 m\u1ed9t b\u1ed9 l\u1ea1c \u1edf \u00dac, \u1edf \u0111\u00f4ng B\u1eafc Phi ch\u00e2u, m\u1ed9t b\u1ed9 l\u1ea1c \u1edf mi\u1ec1n Nam n\u01b0\u1edbc \u1ea4n \u0111\u1ed9 v\u00e0 b\u1ed9 l\u1ea1c da \u0111\u1ecf \u1edf bang Arizona (Hoa K\u1ef3). Tuy nhi\u00ean, n\u00f3i \u0111\u1ebfn \u201cbu-m\u01a1-r\u0103ng\u201d l\u00e0 ng\u01b0\u1eddi ta th\u01b0\u1eddng ngh\u0129 ngay \u0111\u1ebfn th\u1ee9 v\u0169 kh\u00ed c\u1ee7a t\u00e1c th\u1ed5 d\u00e2n \u1edf ch\u00e2u \u00dac.<\/p>\n\n\n\n
C\u00f3 hai lo\u1ea1i \u201cbu-m\u01a1-r\u0103ng\u201d: lo\u1ea1i \u201c\u0111i lu\u00f4n\u201d v\u00e0 lo\u1ea1i \u201cquay l\u1ea1i\u201d. Tuy nhi\u00ean kh\u1ea3 n\u0103ng s\u00e1t th\u01b0\u01a1ng c\u1ee7a lo\u1ea1i \u201c\u0111i lu\u00f4n\u201d cao h\u01a1n c\u1ee7a lo\u1ea1i \u201cquay l\u1ea1i\u201d. Ng\u01b0\u1eddi ta n\u00f3i r\u1eb1ng v\u1edbi c\u00e1i \u201cbu-m\u01a1-r\u0103ng\u201d lo\u1ea1i \u201c\u0111i lu\u00f4n\u201d, m\u1ed9t th\u1ed5 d\u00e2n ch\u00e2u \u00dac c\u00f3 th\u1ec3 ch\u1eb7t \u0111\u00f4i m\u1ed9t con v\u1eadt nh\u1ecf \u0111ang ch\u1ea1y. Tuy nhi\u00ean, lo\u1ea1i \u201cquay l\u1ea1i\u201d n\u1ed5i ti\u1ebfng h\u01a1n v\u00e0 \u0111\u01b0\u1ee3c h\u1ea7u nh\u01b0 c\u1ea3 th\u1ebf gi\u1edbi bi\u1ebft v\u1ec1 s\u1ef1 l\u1ea1 l\u00f9ng c\u1ee7a n\u00f3. Th\u1eadt ra, ch\u00ednh th\u1ed5 d\u00e2n ch\u00e2u \u00dac ch\u1ec9 coi \u201cbu-m\u01a1-r\u0103ng\u201d l\u00e0 m\u1ed9t th\u1ee9 \u0111\u1ed3 ch\u01a1i ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t v\u0169 kh\u00ed quan tr\u1ecdng. \u0111\u00f4i khi n\u00f3 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u201cch\u00e9m\u201d chim ch\u00f3c.<\/p>\n\n\n\n
Bu-m\u01a1-r\u0103ng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng g\u1ed7 c\u00f3 hai c\u00e1nh h\u01a1i d\u1eb9p g\u1ea7n gi\u1ed1ng nh\u01b0 hai c\u00e1nh cung v\u1edbi m\u1ed9t g\u00f3c trong kho\u1ea3ng t\u1eeb 90 \u0111\u1ebfn 120 \u0111\u1ed9. Hai c\u00e1nh cung c\u00f3 m\u1ed9t m\u00e9p d\u00e0y v\u00e0 m\u1ed9t m\u00e9p m\u1ecfng v\u00e0 h\u01a1i v\u00eanh \u0111\u1ed1i v\u1edbi nhau v\u00e0o kho\u1ea3ng 2 \u0111\u1ed9 so v\u1edbi m\u1eb7t ph\u1eb3ng ngang c\u1eaft trung t\u00e2m bu-m\u01a1-r\u0103ng. Kh\u00f4ng kh\u00ed \u00e9p l\u00ean ch\u1ed7 ph\u00ecnh ra c\u1ee7a ph\u00eda m\u00e9p d\u00e0y v\u00e0 \u0111\u1ed9 v\u00eanh h\u01b0\u1edbng xu\u1ed1ng \u0111\u00e3 khi\u1ebfn cho bu-m\u01a1-r\u0103ng bay v\u00f2ng tr\u1edf l\u1ea1i.<\/p>\n\n\n\n
Nh\u1eefng ng\u01b0\u1eddi s\u01a1 khai \u1edf ch\u00e2u \u00dac \u0111\u00e3 c\u00f3 th\u1ec3 ch\u1ebf t\u1ea1o bu-m\u01a1- r\u0103ng cong m\u1ed9t c\u00e1ch l\u1ea1 l\u00f9ng. H\u1ecd c\u00f3 th\u1ec3 n\u00e9m n\u00f3 bay \u0111\u01b0\u1ee3c m\u1ed9t qu\u00e3ng \u0111\u01b0\u1eddng g\u1ea7n th\u1eb3ng d\u00e0i g\u1ea7n 30m theo m\u1ed9t \u0111\u01b0\u1eddng v\u00f2ng \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 25m r\u1ed3i quay tr\u1edf l\u1ea1i ng\u01b0\u1eddi n\u00e9m ho\u1eb7c c\u00f3 th\u1ec3 n\u00e9m cho bu-m\u01a1-r\u0103ng ch\u1ea1m m\u1eb7t \u0111\u1ea5t, r\u1ed3i v\u00f2ng l\u00ean v\u00e0 quay tr\u1edf l\u1ea1i ng\u01b0\u1eddi n\u00e9m. Khi n\u00e9m bu-m\u01a1-r\u0103ng v\u1ec1 ph\u00eda tr\u01b0\u1edbc, c\u1ed5 tay ph\u1ea3i v\u1eb7n quay xu\u1ed1ng ph\u00eda d\u01b0\u1edbi. Ng\u01b0\u1eddi ta \u0111\u00e3 th\u1ea5y c\u00f3 ng\u01b0\u1eddi n\u00e9m \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1i bu-m\u01a1-r\u0103ng bay xa g\u1ea7n 40m r\u1ed3i m\u1edbi bay v\u00f2ng tr\u1edf l\u1ea1i.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 5 – Arkady Leokum Keo hay h\u1ed3 (d\u00e1n) l\u00e0 ch\u1ea5t li\u1ec7u l\u00e0m cho hai v\u1eadt d\u00ednh ch\u1eb7t v\u00e0o nhau. C\u00e1i \u00fd t\u01b0\u1edfng d\u00e1n v\u1eadt n\u1ecd d\u00ednh v\u00e0o v\u1eadt kia ch\u1eb3ng ph\u1ea3i l\u00e0 m\u1edbi m\u1ebb g\u00ec n\u1ebfu kh\u00f4ng mu\u1ed1n n\u00f3i l\u00e0 n\u00f3 \u201cx\u01b0a nh\u01b0 […]<\/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],"tags":[],"class_list":["post-14624","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14624","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=14624"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14624\/revisions"}],"predecessor-version":[{"id":14625,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14624\/revisions\/14625"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=14624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=14624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=14624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}