M\u00f9a h\u00e8 th\u01b0\u1eddng x\u1ea3y ra m\u01b0a gi\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y c\u1ea3nh t\u01b0\u1ee3ng s\u1ea5m vang ch\u1edbp gi\u1eadt. Tr\u00ean kh\u00f4ng trung v\u00ec sao l\u1ea1i xu\u1ea5t hi\u1ec7n s\u1ea5m ch\u1edbp nh\u1ec9? Tr\u00ean th\u1ef1c t\u1ebf, \u0111\u00f3 l\u00e0 kh\u00f4ng kh\u00ed gi\u1eefa c\u00e1c \u0111\u00e1m m\u00e2y, ho\u1eb7c gi\u1eefa m\u00e2y v\u1edbi m\u1eb7t \u0111\u1ea5t b\u1ecb \u0111i\u1ec7n \u00e1p c\u1ef1c k\u00ec cao \u0111\u00e1nh xuy\u00ean, x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng ph\u00f3ng \u0111i\u1ec7n d\u1eef d\u1ed9i. N\u0103ng l\u01b0\u1ee3ng c\u1ee7a lo\u1ea1i ph\u00f3ng \u0111i\u1ec7n n\u00e0y r\u1ea5t l\u1edbn, \u0111i\u1ec7n \u00e1p t\u1edbi v\u00e0i tr\u0103m tri\u1ec7u v\u00f4n, d\u00f2ng \u0111i\u1ec7n cao t\u1edbi v\u00e0i ch\u1ee5c ngh\u00ecn ampe, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a trung t\u00e2m ph\u00f3ng \u0111i\u1ec7n c\u0169ng \u0111\u1ea1t v\u00e0i ch\u1ee5c ngh\u00ecn \u0111\u1ed9 Celsius, uy l\u1ef1c s\u1ea5m s\u00e9t r\u1ea5t kinh kh\u1ee7ng. N\u1ebfu lo\u1ea1i ph\u00f3ng \u0111i\u1ec7n n\u00e0y x\u1ea3y ra gi\u1eefa \u0111\u00e1m m\u00e2y v\u00e0 to\u00e0 ki\u1ebfn tr\u00fac to cao th\u00ec s\u1ebd l\u00e0m h\u01b0 h\u1ea1i to\u00e0 nh\u00e0 v\u00e0 g\u00e2y ra ho\u1ea3 ho\u1ea1n. Gi\u1ea3 s\u1eed l\u00fac \u1ea5y c\u00f3 ng\u01b0\u1eddi \u1edf ngay t\u1ea1i khu v\u1ef1c ph\u00f3ng \u0111i\u1ec7n ho\u1eb7c \u1edf g\u1ea7n \u0111\u1ea5y th\u00ec s\u1ebd b\u1ecb s\u00e9t \u0111\u00e1nh tr\u00fang. \u0110\u00f3 l\u00e0 m\u1ed9t lo\u1ea1i tai ho\u1ea1 thi\u00ean nhi\u00ean, ng\u01b0\u1eddi ta th\u01b0\u1eddng g\u1ecdi l\u00e0 s\u00e9t \u0111\u00e1nh.<\/p>\n\n\n\n
V\u00ec v\u1eady, tr\u00ean nhi\u1ec1u to\u00e0 ki\u1ebfn tr\u00fac cao to c\u00f3 l\u1eafp c\u1ed9t thu l\u00f4i hay c\u1ed9t ch\u1ed1ng s\u00e9t, t\u1ee9c l\u00e0 c\u1ed9t b\u1ea3o v\u1ec7 to\u00e0 nh\u00e0 kh\u1ecfi b\u1ecb s\u00e9t \u0111\u00e1nh. C\u1ed9t thu l\u00f4i \u0111\u01b0\u1ee3c nh\u00e0 khoa h\u1ecdc M\u0129 Franklin ph\u00e1t minh ra n\u0103m 1752. N\u00f3 c\u00f3 t\u00e1c d\u1ee5ng “ch\u1ed1ng s\u00e9t” nh\u01b0 th\u1ebf n\u00e0o nh\u1ec9?<\/p>\n\n\n\n
C\u1ed9t thu l\u00f4i th\u1ef1c ra kh\u00f4ng h\u1ec1 ch\u1ed1ng s\u00e9t, m\u00e0 l\u00e0 l\u1ee3i d\u1ee5ng v\u1ecb tr\u00ed c\u00f3 l\u1ee3i ch\u0129a l\u00ean tr\u1eddi cao c\u1ee7a n\u00f3 h\u00fat l\u1ea5y s\u00e9t v\u00e0o b\u1ea3n th\u00e2n, ch\u1ecbu b\u1ecb s\u00e9t \u0111\u00e1nh, qua \u0111\u00f3 b\u1ea3o v\u1ec7 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c kh\u1ecfi b\u1ecb s\u00e9t \u0111\u00e1nh. C\u1ed9t thu l\u00f4i do ba b\u1ed9 ph\u1eadn: \u0111\u1ea7u thu s\u00e9t, d\u00e2y d\u1eabn v\u00e0 t\u1ea5m n\u1ed1i \u0111\u1ea5t c\u1ea5u th\u00e0nh. C\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a c\u1ed9t thu l\u00f4i \u0111\u1ec1u ph\u1ea3i c\u00f3 \u0111i\u1ec7n tr\u1edf r\u1ea5t nh\u1ecf, m\u1eb7t c\u1eaft ph\u1ea3i \u0111\u1ea1t m\u1ed9t k\u00edch th\u01b0\u1edbc nh\u1ea5t \u0111\u1ecbnh \u0111\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n s\u00e9t l\u1edbn lao \u0111i qua. \u0110\u1ea7u thu s\u00e9t, th\u00f4ng th\u01b0\u1eddng d\u00f9ng th\u00e9p tr\u00f2n m\u1ea1 k\u1ebdm \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 4 cm ho\u1eb7c \u1ed1ng th\u00e9p \u0111\u1ec3 ch\u1ebf t\u1ea1o ra, \u0111\u1ed9 d\u00e0i kho\u1ea3ng 2 m tr\u1edf l\u00ean. N\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp v\u1eefng ch\u1eafc tr\u00ean \u0111\u1ec9nh to\u00e0 nh\u00e0 ho\u1eb7c tr\u00ean \u1ed1ng kh\u00f3i. D\u00e2y d\u1eabn n\u1ed1i li\u1ec1n \u0111\u1ea7u thu s\u00e9t v\u1edbi t\u1ea5m n\u1ed1i \u0111\u1ea5t, c\u00f3 th\u1ec3 d\u00f9ng d\u00e2y th\u00e9p xo\u1eafn m\u1ea1 k\u1ebdm ho\u1eb7c d\u00e2y th\u00e9p b\u1eb9t \u0111\u1ec3 l\u00e0m th\u00e0nh. T\u1ea5m n\u1ed1i \u0111\u1ea5t ph\u1ea3i ch\u00f4n \u1edf \u0111\u1ed9 s\u00e2u nh\u1ea5t \u0111\u1ecbnh d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t v\u00e0 ti\u1ebfp x\u00fac t\u1ed1t v\u1edbi \u0111\u1ea5t, d\u1ec5 d\u00e0ng truy\u1ec1n d\u00f2ng \u0111i\u1ec7n s\u00e9t xu\u1ed1ng \u0111\u1ea5t s\u00e2u. C\u0169ng c\u00f3 th\u1ec3 l\u1ee3i d\u1ee5ng nh\u1eefng v\u1eadt ti\u1ebfp \u0111\u1ea5t t\u1ef1 nhi\u00ean nh\u01b0 \u0111\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc m\u00e1y, \u1ed1ng tho\u00e1t n\u01b0\u1edbc b\u1ea9n v.v. \u0111\u1ec3 l\u00e0m t\u1ea5m n\u1ed1i \u0111\u1ea5t.<\/p>\n\n\n\n
Ngo\u00e0i ra, khi m\u00e2y gi\u00f4ng ch\u1ee9a \u0111i\u1ec7n \u0111\u1ebfn g\u1ea7n to\u00e0 ki\u1ebfn tr\u00fac ho\u1eb7c thi\u1ebft b\u1ecb, c\u00e1c \u0111i\u1ec7n t\u00edch m\u00e0 ch\u00fang ta c\u1ea3m \u1ee9ng d\u1ecdc theo \u0111\u1ec9nh \u0111\u1ea7u c\u1ee7a c\u1ed9t thu l\u00f4i c\u00f3 th\u1ec3 l\u1ea7n l\u01b0\u1ee3t ti\u1ebfn h\u00e0nh ph\u00f3ng \u0111i\u1ec7n ch\u00f3p nh\u1ecdn, trung ho\u00e0 l\u1eabn nhau v\u1edbi s\u00e9t. V\u00ec v\u1eady, c\u1ed9t thu l\u00f4i c\u00f2n c\u00f3 th\u1ec3 tr\u00e1nh x\u1ea3y ra s\u00e9t c\u1ea3m \u1ee9ng.<\/p>\n\n\n\n
Ph\u1ea3i l\u1eafp c\u1ed9t thu l\u00f4i cao t\u1edbi \u0111\u00e2u m\u1edbi t\u1ed1t? T\u1ea5t nhi\u00ean l\u00e0 c\u00e0ng cao c\u00e0ng t\u1ed1t. L\u1eafp \u0111\u01b0\u1ee3c c\u00e0ng cao, ph\u1ea1m vi b\u1ea3o v\u1ec7 c\u0169ng c\u00e0ng l\u1edbn. Nh\u01b0ng c\u0169ng kh\u00f4ng n\u00ean qu\u00e1 cao, v\u00ec nh\u01b0 v\u1eady th\u00ec s\u1ef1 v\u1eefng ch\u1eafc c\u1ee7a c\u1ed9t thu l\u00f4i s\u1ebd g\u1eb7p r\u1eafc r\u1ed1i, khi gi\u00f3 to th\u1ed5i th\u00ec n\u00f3 c\u00f3 th\u1ec3 b\u1ecb nghi\u00eang ho\u1eb7c \u0111\u1ed5 s\u1eadp xu\u1ed1ng, s\u1ebd m\u1ea5t \u0111i t\u00e1c d\u1ee5ng ch\u1ed1ng s\u00e9t. V\u00ec v\u1eady, tr\u00ean to\u00e0 ki\u1ebfn tr\u00fac c\u00f3 ph\u1ea1m vi t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn, th\u01b0\u1eddng ng\u01b0\u1eddi ta l\u1eafp v\u00e0i c\u1ed9t thu l\u00f4i c\u00f3 t\u00e1c d\u1ee5ng b\u1ea3o v\u1ec7 an to\u00e0n nh\u01b0 nhau.<\/p>\n\n\n\n
\u1ede ngo\u1ea1i \u00f4, m\u1ed7i khi g\u1eb7p c\u01a1n m\u01b0a gi\u00f4ng, kh\u00f4ng n\u00ean \u0111\u1ebfn tr\u00fa m\u01b0a \u1edf d\u01b0\u1edbi g\u1ed1c c\u00e2y to, v\u00ec khi m\u00e2y gi\u00f4ng ph\u00f3ng \u0111i\u1ec7n xu\u1ed1ng m\u1eb7t \u0111\u1ea5t, bao gi\u1edd c\u0169ng theo con \u0111\u01b0\u1eddng g\u1ea7n nh\u1ea5t, c\u00e2y to nh\u00f4 cao l\u00ean m\u1eb7t \u0111\u1ea5t ch\u00ednh l\u00e0 con \u0111\u01b0\u1eddng ph\u00f3ng \u0111i\u1ec7n t\u1ed1t nh\u1ea5t. Ch\u00fang ta th\u01b0\u1eddng th\u1ea5y khi s\u00e9t \u0111\u00e1nh bao gi\u1edd c\u0169ng \u0111\u00e1nh g\u1eaby m\u1ed9t s\u1ed1 c\u00e2y cao to. N\u1ebfu b\u1ea1n n\u1ea5p d\u01b0\u1edbi c\u00e2y \u0111\u1ec3 tr\u00e1nh m\u01b0a, th\u1ebf th\u00ec s\u1ebd g\u1eb7p nguy c\u01a1 b\u1ecb s\u00e9t \u0111\u00e1nh.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: C\u1ed9t thu l\u00f4i; Ph\u00f3ng \u0111i\u1ec7n; S\u00e9t \u0111\u00e1nh.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
M\u00f9a h\u00e8 th\u01b0\u1eddng x\u1ea3y ra m\u01b0a gi\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y c\u1ea3nh t\u01b0\u1ee3ng s\u1ea5m vang ch\u1edbp gi\u1eadt. Tr\u00ean kh\u00f4ng trung v\u00ec sao l\u1ea1i xu\u1ea5t hi\u1ec7n s\u1ea5m ch\u1edbp nh\u1ec9? Tr\u00ean th\u1ef1c t\u1ebf, \u0111\u00f3 l\u00e0 kh\u00f4ng kh\u00ed gi\u1eefa c\u00e1c \u0111\u00e1m m\u00e2y, ho\u1eb7c gi\u1eefa m\u00e2y v\u1edbi m\u1eb7t \u0111\u1ea5t b\u1ecb \u0111i\u1ec7n \u00e1p c\u1ef1c k\u00ec cao \u0111\u00e1nh xuy\u00ean, x\u1ea3y ra […]<\/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-5708","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\/5708","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=5708"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5708\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}