T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 10 – Arkady Leokum<\/p>\n\n\n\n
Boomerang th\u01b0\u1eddng \u0111\u01b0\u1ee3c ngh\u0129 r\u1eb1ng l\u00e0 ph\u00e1t minh c\u1ee7a th\u1ed5 d\u00e2n \u00dac. Nh\u01b0ng qua nhi\u1ec1u n\u0103m, suy ngh\u0129 \u0111\u00f3 \u0111\u00e3 thay \u0111\u1ed5i khi t\u1ea1i c\u00e1c \u0111\u1ecba \u0111i\u1ec3m kh\u1ea3o c\u1ed5 n\u1eb1m r\u1ea5t xa Arizona v\u00e0 \u1ea4n \u0110\u1ed9, c\u00e1c m\u1eabu boomerang c\u1ed5 nh\u1ea5t \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn. Ch\u00fang kho\u1ea3ng 23.000 n\u0103m tu\u1ed5i, l\u00e0m t\u1eeb ng\u00e0 c\u1ee7a voi mammoth, \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c hang \u0111\u1ed9ng \u1edf Oblazowa Rock, mi\u1ec1n nam Ph\u1ea7n Lan n\u0103m 1987. Cho n\u00ean ch\u1ec9 c\u00f3 v\u1ebb nh\u01b0 l\u00e0 kh\u1ea3 n\u0103ng bay ngo\u1ea1n m\u1ee5c c\u1ee7a boomerang \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t minh ra \u0111\u1ed9c l\u1eadp v\u1edbi nhau nhi\u1ec1u l\u1ea7n.<\/p>\n\n\n\n
B\u1ea5t k\u1ec3 ngu\u1ed3n g\u1ed1c ti\u1ec3n s\u1eed c\u1ee7a m\u00ecnh, boomerang l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ea7u ti\u00ean khai th\u00e1c s\u1ef1 k\u1ebft h\u1ee3p kh\u00e9o l\u00e9o gi\u1eefa l\u1ef1c n\u00e2ng v\u00e0 l\u1ef1c xo\u00e1y. \u0110\u1ec3 t\u0103ng c\u01b0\u1eddng l\u1ef1c n\u00e2ng, boomerang \u0111\u01b0\u1ee3c n\u00e9m ra t\u1eeb m\u1ed9t v\u1ecb tr\u00ed g\u1ea7n nh\u01b0 th\u1eb3ng \u0111\u1ee9ng, \u1edf m\u1ed9t g\u00f3c kho\u1ea3ng 15 \u0111\u1ed9 so v\u1edbi tr\u1ee5c ngang. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p ch\u00fang xo\u00e1y v\u00e0 c\u1eaft ngang kh\u00f4ng kh\u00ed \u1edf m\u1ed9t g\u00f3c nghi\u00eang, l\u00e0m ch\u1ec7ch h\u01b0\u1edbng bay c\u1ee7a n\u00f3 v\u00e0 t\u1ea1o ra l\u1ef1c n\u00e2ng khi n\u00f3 bay.<\/p>\n\n\n\n
Kh\u1ea3 n\u0103ng n\u1ed5i ti\u1ebfng c\u1ee7a boomerang l\u00e0 quay ng\u01b0\u1ee3c tr\u1edf l\u1ea1i n\u01a1i v\u1eeba n\u00e9m n\u00f3 ra nh\u1edd v\u00e0o m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng, \u0111\u00f3 l\u00e0 nh\u1edd v\u00e0o s\u1ef1 xo\u00e1y. Do kh\u1ea3 n\u0103ng xo\u00e1y c\u1ee7a m\u00ecnh, ph\u1ea7n tr\u00ean c\u1ee7a \u201cc\u00e1nh\u201d c\u1ee7a boomerang c\u1eaft ngang d\u00f2ng kh\u00f4ng kh\u00ed \u0111i \u0111\u1ebfn v\u1edbi m\u1ed9t t\u1ed1c \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i cao h\u01a1n ph\u1ea7n b\u00ean d\u01b0\u1edbi v\u00e0 do v\u1eady t\u1ea1o ra nhi\u1ec1u l\u1ef1c n\u00e2ng h\u01a1n. L\u1ef1c n\u00e2ng n\u00e0y t\u1ea1o ra m\u1ed9t l\u1ef1c quay tr\u00ean boomerang khi\u1ebfn boomerang b\u1eaft \u0111\u1ea7u bay theo m\u1ed9t \u0111\u01b0\u1eddng cong, h\u01a1i gi\u1ed1ng nh\u01b0 con quay \u0111\u1ed3 ch\u01a1i xoay tr\u00f2n tr\u00ean \u0111\u1ebf c\u1ee7a n\u00f3.<\/p>\n\n\n\n
Ch\u01b0a h\u1ebft, \u0111\u1ed9 l\u1edbn c\u1ee7a v\u00f2ng tr\u00f2n m\u00e0 boomerang bay theo kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ee9c m\u1ea1nh n\u00e9m boomerang \u0111 i hay t\u1ed1c \u0111\u1ed9 xo\u00e1y c\u1ee7a boomerang m\u00e0 n\u00f3 ph\u1ee5 thu\u1ed9c \u0111\u1ea7u ti\u00ean l\u00e0 v\u00e0o s\u1ea3i c\u00e1nh v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a boomerang, l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p h\u00e0i h\u00f2a gi\u1eefa l\u1ef1c xo\u00e1y v\u00e0 n\u00e2ng. N\u00e9m t\u1ed1t, boomerang s\u1ebd bay l\u00e2u h\u01a1n v\u00e0 qu\u1ef9 \u0111\u1ea1o v\u00f2ng bay c\u00f3 th\u1ec3 d\u00e0i t\u1edbi h\u01a1n 120 m.<\/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 10 – Arkady Leokum Boomerang th\u01b0\u1eddng \u0111\u01b0\u1ee3c ngh\u0129 r\u1eb1ng l\u00e0 ph\u00e1t minh c\u1ee7a th\u1ed5 d\u00e2n \u00dac. Nh\u01b0ng qua nhi\u1ec1u n\u0103m, suy ngh\u0129 \u0111\u00f3 \u0111\u00e3 thay \u0111\u1ed5i khi t\u1ea1i c\u00e1c \u0111\u1ecba \u0111i\u1ec3m kh\u1ea3o c\u1ed5 n\u1eb1m r\u1ea5t xa Arizona v\u00e0 \u1ea4n \u0110\u1ed9, c\u00e1c m\u1eabu boomerang […]<\/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-15951","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\/15951","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=15951"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15951\/revisions"}],"predecessor-version":[{"id":15952,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15951\/revisions\/15952"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=15951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=15951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=15951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}