Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
C\u00e1c em h\u1ecdc sinh<\/a> l\u1edbp 9 c\u00f3 l\u1ebd \u0111\u00e3 qu\u00e1 quen v\u1edbi nh\u1eefng kh\u00e1i ni\u1ec7m v\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb. Trong nh\u1eefng ch\u01b0\u01a1ng tr\u00ecnh n\u0103m h\u1ecdc l\u1edbp 7, c\u00e1c em c\u00f3 th\u1ec3 \u0111\u00e3 bi\u1ebft \u0111\u1ebfn th\u00ed nghi\u1ec7m cu\u1ed9n d\u00e2y c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua. C\u00e2u h\u1ecfi \u0111\u1eb7t ra l\u00e0 ch\u1ec9 c\u00f3 d\u00f2ng \u0111i\u1ec7n khi ch\u1ea1y qua cu\u1ed9n d\u00e2y m\u1edbi x\u1ea3y ra t\u00e1c d\u1ee5ng t\u1eeb? N\u1ebfu nh\u01b0 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y d\u1eabn th\u1eb3ng ho\u1eb7c d\u00e2y d\u1eabn c\u00f3 h\u00ecnh d\u1ea1ng n\u00e0o kh\u00e1c th\u00ec n\u00f3 c\u00f3 t\u00e1c d\u1ee5ng n\u00e0o kh\u00f4ng? N\u1ebfu b\u1ea1n \u0111ang quan t\u00e2m \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00f9ng \u0111\u1ecdc ngay b\u00e0i vi\u1ebft v\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec3 bi\u1ebft th\u00eam chi ti\u1ebft nh\u00e9. Ch\u00fang t\u00f4i tin r\u1eb1ng chia s\u1ebb m\u00e0 m\u00ecnh mang \u0111\u1ebfn s\u1ebd l\u00e0m cho b\u1ea1n th\u1ea5y h\u00e0i l\u00f2ng. C\u00f9ng b\u1eaft \u0111\u1ea7u th\u00f4i.<\/p>\n\n\n\n Th\u00ed nghi\u1ec7m t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n t\u1eeb tr\u01b0\u1eddng<\/p>\n\n\n\n Th\u00f4ng tin v\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng<\/p>\n\n\n\n L\u1ef1c t\u1eeb l\u00e0 g\u00ec?<\/p>\n\n\n\n C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng, d\u00f2ng \u0111i\u1ec7n khi ch\u1ea1y qua d\u00e2y d\u1eabn th\u1eb3ng ho\u1eb7c d\u00e2y d\u1eabn c\u00f3 h\u00ecnh d\u1ea1ng b\u1ea5t k\u1ef3 s\u1ebd g\u00e2y ra t\u00e1c d\u1ee5ng t\u1eeb. Ch\u00fang \u0111\u01b0\u1ee3c g\u1ecdi t\u1eaft l\u00e0 l\u1ef1c t\u1eeb v\u00e0 c\u00f3 t\u00e1c d\u1ee5ng l\u00ean kim nam ch\u00e2m \u0111\u1eb7t \u1edf g\u1ea7n \u0111\u00f3. Ta c\u00f3 th\u1ec3 n\u00f3i r\u1eb1ng d\u00f2ng \u0111i\u1ec7n c\u00f3 t\u00e1c d\u1ee5ng t\u1eeb.<\/p>\n\n\n\n T\u1eeb tr\u01b0\u1eddng l\u00e0 g\u00ec?<\/p>\n\n\n\n Nh\u1eafc \u0111\u1ebfn t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng, ta kh\u00f4ng th\u1ec3 qu\u00ean \u0111\u01b0\u1ee3c t\u1eeb tr\u01b0\u1eddng. Kim nam ch\u00e2m \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t nam ch\u00e2m th\u1eed, hay \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u1eeb tr\u01b0\u1eddng. Trong kh\u00f4ng gian xung quanh nam ch\u00e2m, d\u00f2ng \u0111i\u1ec7n xung quanh s\u1ebd c\u00f3 kh\u1ea3 n\u0103ng t\u00e1c d\u1ee5ng l\u1ef1c t\u1eeb l\u00ean tr\u00ean kim nam ch\u00e2m \u0111\u01b0\u1ee3c \u0111\u1eb7t trong n\u00f3. Ta c\u00f3 th\u1ec3 n\u00f3i r\u1eb1ng kh\u00f4ng gian \u0111\u00f3 c\u00f3 t\u1eeb tr\u01b0\u1eddng.<\/p>\n\n\n\n Ngo\u00e0i ra, t\u1ea1i m\u1ed7i tr\u1ecb tr\u00ed nh\u1ea5t \u0111\u1ecbnh trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a thanh nam ch\u00e2m ho\u1eb7c d\u00f2ng \u0111i\u1ec7n, ta s\u1ebd th\u1ea5y kim nam ch\u00e2m \u0111\u1ec1u ch\u1ec9 v\u1ec1 m\u1ed9t h\u01b0\u1edbng x\u00e1c \u0111\u1ecbnh.<\/p>\n\n\n\n C\u00e1ch nh\u1eadn bi\u1ebft t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng ra sao?<\/p>\n\n\n\n C\u00e1ch nh\u1eadn bi\u1ebft t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng kh\u00f4ng qu\u00e1 kh\u00f3 kh\u0103n. Ng\u01b0\u1eddi ta th\u00f4ng th\u01b0\u1eddng kh\u00f4ng nh\u1eadn bi\u1ebft tr\u1ef1c ti\u1ebfp t\u1eeb tr\u01b0\u1eddng b\u1eb1ng c\u00e1c gi\u00e1c quan. S\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 ri\u00eang l\u00e0 c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft, ch\u00ednh l\u00e0 chi\u1ebfc nam ch\u00e2m th\u1eed.<\/p>\n\n\n\n Nh\u1edd s\u1eed d\u1ee5ng nam ch\u00e2m c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng: n\u01a1i n\u00e0o b\u00ean trong kh\u00f4ng gian c\u00f3 l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng \u0111\u1ebfn kim nam ch\u00e2m th\u00ec n\u01a1i \u0111\u00f3 s\u1ebd c\u00f3 t\u1eeb tr\u01b0\u1eddng.<\/p>\n\n\n\n T\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a nam ch\u00e2m<\/p>\n\n\n\n C\u00e1c t\u00e1c d\u1ee5ng kh\u00e1c c\u1ee7a d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n Ngo\u00e0i t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng, d\u00f2ng \u0111i\u1ec7n c\u0169ng c\u00f3 nh\u1eefng t\u00e1c d\u1ee5ng kh\u00e1c, \u0111\u00f3 ch\u00ednh l\u00e0 t\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc v\u00e0 t\u00e1c d\u1ee5ng sinh l\u00fd. Nh\u1eefng t\u00e1c d\u1ee5ng n\u00e0y \u0111\u1ec1u \u0111\u01b0\u1ee3c g\u1eb7p r\u1ea5t nhi\u1ec1u trong c\u00e1c b\u00e0i h\u1ecdc, do \u0111\u00f3 b\u1ea1n \u0111\u1eebng b\u1ecf l\u1ee1 t\u00ecm hi\u1ec3u nh\u00e9.<\/p>\n\n\n\n T\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc c\u1ee7a d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n D\u00f2ng \u0111i\u1ec7n khi \u0111i qua dung d\u1ecbch mu\u1ed1i \u0111\u1ed3ng s\u1ebd l\u00e0m cho v\u1eadt b\u00ean trong dung d\u1ecbch n\u1ed1i v\u1edbi c\u1ef1c \u00e2m \u0111\u01b0\u1ee3c ph\u1ee7 m\u1ed9t l\u1edbp \u0111\u1ed3ng l\u00ean. \u0110\u00e2y g\u1ecdi l\u00e0 t\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc c\u1ee7a d\u00f2ng \u0111i\u1ec7n. B\u1edfi th\u1ebf, d\u1ef1a v\u00e0o nh\u1eefng t\u00e1c d\u1ee5ng n\u00e0y, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u00fac \u0111i\u1ec7n, m\u1ea1 kim lo\u1ea1i, luy\u1ec7n kim\u2026<\/p>\n\n\n\n T\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc nh\u01b0 v\u1eady c\u00f2n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng v\u00e0o \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u0129a CD nghe nh\u1ea1c. C\u00e1ch l\u00e0m t\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean \u0111\u00e3 cho ra \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng \u0111\u0129a l\u1edbn, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u mua v\u00e0 s\u1eed d\u1ee5ng \u0111\u0129a gi\u00e1 r\u1ebb.<\/p>\n\n\n\n T\u00e1c d\u1ee5ng sinh l\u00fd c\u1ee7a d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n Ngo\u00e0i t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng v\u00e0 t\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc th\u00ec t\u00e1c d\u1ee5ng sinh l\u00fd c\u0169ng \u0111ang \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 r\u1ea5t cao. D\u00f2ng \u0111i\u1ec7n s\u1ebd g\u00e2y ra t\u00e1c d\u1ee5ng sinh l\u00fd khi \u0111i qua c\u1ea3 c\u01a1 th\u1ec3 \u0111\u1ed9ng v\u1eadt v\u00e0 c\u01a1 th\u1ec3 c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n\n\n\n N\u1ebfu nh\u01b0 d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 l\u00e0 1mA v\u00e0 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi, n\u00f3 s\u1ebd g\u00e2y ra c\u1ea3m gi\u00e1c t\u00ea. C\u01a1 th\u1ec3 s\u1ebd b\u1ecb \u0111i\u1ec7n gi\u1eadt v\u00e0 co c\u01a1 b\u1eafp l\u1ea1i. D\u00f2ng \u0111i\u1ec7n khi c\u00e0ng m\u1ea1nh l\u00ean s\u1ebd c\u00e0ng g\u00e2y ra nhi\u1ec1u nguy hi\u1ec3m \u0111\u1ebfn s\u1ee9c kh\u1ecfe, th\u1eadm ch\u00ed l\u00e0 c\u1ea3 t\u00ednh m\u1ea1ng c\u1ee7a con ng\u01b0\u1eddi. B\u1edfi d\u00f2ng \u0111i\u1ec7n m\u1ea1nh s\u1ebd g\u00e2y ra s\u1ef1 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng t\u1edbi h\u1ec7 th\u1ea7n kinh. Ch\u00fang khi\u1ebfn cho tim ng\u1eebng \u0111\u1eadp, h\u01a1i th\u1edf b\u1ecb ng\u1ea1t, d\u00f2ng \u0111i\u1ec7n m\u1ea1nh th\u1eadm ch\u00ed c\u00f2n g\u00e2y ra t\u1eed vong.<\/p>\n\n\n\n N\u1ebfu nh\u01b0 d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 nh\u1ecf, ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1eefa b\u1ec7nh. Ph\u01b0\u01a1ng ph\u00e1p \u0111\u00f3 g\u1ecdi l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n ch\u00e2m. Trong c\u00e1ch n\u00e0y, \u0111i\u1ec7n c\u1ef1c s\u1ebd \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi c\u00e1c huy\u1ec7t. L\u00fac \u0111\u00f3 d\u00f2ng \u0111i\u1ec7n s\u1ebd l\u00e0m cho c\u00e1c huy\u1ec7t k\u00edch th\u00edch ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3. C\u00f3 th\u1ec3 n\u00f3i ng\u00e0y nay, Vi\u1ec7t Nam \u0111ang l\u00e0 n\u01b0\u1edbc c\u00f3 n\u1ec1n y h\u1ecdc ch\u00e2m c\u1ee9u c\u1ef1c k\u1ef3 ti\u00ean ti\u1ebfn v\u00e0 hi\u1ec7n \u0111\u1ea1i so v\u1edbi c\u00e1c qu\u1ed1c gia kh\u00e1c tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ch\u1eefa b\u1ec7nh n\u00e0y l\u00e2u d\u00e0i v\u00e0 h\u1ecd nh\u1eadn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u nh\u1eefng hi\u1ec7u qu\u1ea3 t\u00edch c\u1ef1c.<\/p>\n\n\n\n \u0110\u1ecbnh ngh\u0129a c\u1ee7a t\u1eeb tr\u01b0\u1eddng l\u00e0 g\u00ec?<\/p>\n\n\n\n B\u00e0i t\u1eadp v\u00e0 b\u00e0i gi\u1ea3i v\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng<\/p>\n\n\n\n B\u00e0i t\u1eadp<\/p>\n\n\n\n B\u00e0i t\u1eadp t\u1ef1 lu\u1eadn<\/p>\n\n\n\n B\u00e0i 1: C\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i pin \u0111\u1ec3 l\u00e2u ng\u00e0y c\u00f9ng v\u1edbi m\u1ed9t \u0111o\u1ea1n d\u00e2y d\u1eabn. N\u1ebfu nh\u01b0 kh\u00f4ng c\u00f3 b\u00f3ng \u0111\u00e8n pin \u0111\u1ec3 th\u1eed, h\u1ecfi c\u00f3 c\u00e1ch n\u00e0o c\u00f3 th\u1ec3 ki\u1ec3m tra pin c\u00f2n \u0111i\u1ec7n kh\u00f4ng khi trong tay ch\u1ec9 c\u00f2n m\u1ed9t kim nam ch\u00e2m?<\/p>\n\n\n\n B\u00e0i 2: Gi\u1ea3 s\u1eed ta c\u00f3 m\u1ed9t d\u00e2y d\u1eabn ch\u1ea1y qua nh\u00e0. N\u1ebfu nh\u01b0 ta kh\u00f4ng d\u00f9ng d\u1ee5ng c\u1ee5 \u0111o \u0111i\u1ec7n, v\u1eady c\u00f3 c\u00e1ch n\u00e0o \u0111\u1ec3 ta bi\u1ebft \u0111\u01b0\u1ee3c trong d\u00e2y d\u1eabn \u0111\u00f3 \u0111ang c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua hay kh\u00f4ng?<\/p>\n\n\n\n B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m<\/p>\n\n\n\n B\u00e0i 1: Trong nh\u1eefng th\u00ed nghi\u1ec7m ph\u00e1t hi\u1ec7n ra t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n, d\u00e2y d\u1eabn AB \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed \u1edf v\u1ecb tr\u00ed nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n A T\u1ea1o v\u1edbi kim nam ch\u00e2m m\u1ed9t g\u00f3c nh\u1ecdn<\/p>\n\n\n\n B Song song so v\u1edbi kim nam ch\u00e2m<\/p>\n\n\n\n C Vu\u00f4ng g\u00f3c so v\u1edbi kim nam ch\u00e2m<\/p>\n\n\n\n D T\u1ea1o v\u1edbi kim nam ch\u00e2m m\u1ed9t g\u00f3c b\u1ea5t k\u1ef3<\/p>\n\n\n\n B\u00e0i 2: T\u1eeb tr\u01b0\u1eddng s\u1ebd kh\u00f4ng t\u1ed3n t\u1ea1i \u1edf \u0111\u00e2u?<\/p>\n\n\n\n A Xung quanh tr\u00e1i \u0111\u1ea5t<\/p>\n\n\n\n B Xung quanh \u0111i\u1ec7n t\u00edch \u0111ang b\u1ecb \u0111\u1ee9ng y\u00ean<\/p>\n\n\n\n C Xung quanh d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n D Xung quanh nam ch\u00e2m<\/p>\n\n\n\n B\u00e0i 3: Ta c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua m\u1ed9t d\u00e2y d\u1eabn th\u1eb3ng c\u00f3 t\u1eeb tr\u01b0\u1eddng d\u1ef1a v\u00e0o m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y?<\/p>\n\n\n\n A D\u00f2ng \u0111i\u1ec7n l\u00e0m cho kim nam ch\u00e2m lu\u00f4n c\u00f9ng h\u01b0\u1edbng so v\u1edbi d\u00e2y d\u1eabn<\/p>\n\n\n\n B D\u00f2ng \u0111i\u1ec7n s\u1ebd l\u00e0m cho kim nam ch\u00e2m l\u1ea1i g\u1ea7n, d\u1ea7n song song v\u00e0 l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng B\u1eafc Nam l\u00fac \u0111\u1ea7u<\/p>\n\n\n\n C D\u00e2y d\u1eabn s\u1ebd h\u00fat c\u00e1c v\u1ee5n s\u1eaft l\u1ea1i g\u1ea7n so v\u1edbi n\u00f3<\/p>\n\n\n\n D D\u00e2y d\u1eabn s\u1ebd h\u00fat c\u00e1c nam ch\u00e2m l\u1ea1i g\u1ea7n so v\u1edbi n\u00f3<\/p>\n\n\n\n \u0110\u00e1p \u00e1n b\u00e0i t\u1eadp<\/p>\n\n\n\n \u0110\u00e1p \u00e1n b\u00e0i t\u1eadp t\u1ef1 lu\u1eadn<\/p>\n\n\n\n B\u00e0i 1: M\u1eafc v\u00e0o hai \u0111\u1ea7u d\u00e2y d\u1eabn v\u1edbi hai c\u1ef1c c\u1ee7a pin cho d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y d\u1eabn. Ta \u0111\u01b0a kim nam ch\u00e2m v\u00e0o l\u1ea1i g\u1ea7n d\u00e2y d\u1eabn. N\u1ebfu nh\u01b0 kim nam ch\u00e2m kh\u00f4ng ch\u1ec9 \u0111\u00fang h\u01b0\u1edbng Nam \u2013 B\u1eafc th\u00ec c\u00f3 ngh\u0129a l\u00e0 pin c\u00f2n \u0111i\u1ec7n. N\u1ebfu kim nam ch\u00e2m ch\u1ec9 chu\u1ea9n h\u01b0\u1edbng Nam \u2013 B\u1eafc th\u00ec ngh\u0129a l\u00e0 kim nam ch\u00e2m kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng, do \u0111\u00f3 pin \u0111\u00e3 h\u1ebft \u0111i\u1ec7n.<\/p>\n\n\n\n B\u00e0i 2: V\u1edbi b\u00e0i t\u1eadp n\u00e0y, ta c\u00f3 hai c\u00e1ch \u0111\u1ec3 c\u00f3 th\u1ec3 gi\u1ea3i \u0111\u00e1p.<\/p>\n\n\n\n C\u00e1ch \u0111\u1ea7u ti\u00ean, ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng d\u00e2y d\u1eabn \u0111\u00f3 v\u00e0 cu\u1ed1n th\u00e0nh d\u00e2y cu\u1ed9n. Ti\u1ebfp theo, ta \u0111\u1eb7t thanh s\u1eaft nh\u1ecf v\u00e0o tr\u01b0\u1edbc cu\u1ed9n d\u00e2y \u0111\u00f3. Ta \u00e1p d\u1ee5ng th\u00f4ng tin v\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng. N\u1ebfu nh\u01b0 b\u00ean trong d\u00e2y d\u1eabn c\u00f3 d\u00f2ng \u0111i\u1ec7n, thanh s\u1eaft ngay l\u1eadp t\u1ee9c s\u1ebd b\u1ecb h\u00fat.<\/p>\n\n\n\n C\u00e1ch th\u1ee9 hai, ta \u0111\u01b0a m\u1ed9t \u0111\u1ea7u thanh nam ch\u00e2m v\u00e0o l\u1ea1i g\u1ea7n m\u1ed9t d\u00e2y d\u1eabn \u0111ang c\u0103ng th\u1eb3ng. N\u1ebfu nh\u01b0 d\u00e2y b\u1ecb rung ho\u1eb7c dao \u0111\u1ed9ng, \u0111i\u1ec1u n\u00e0y \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c b\u00ean trong d\u00e2y d\u1eabn c\u00f3 d\u00f2ng \u0111i\u1ec7n. C\u00f2n n\u1ebfu nh\u01b0 d\u00e2y kh\u00f4ng g\u1eb7p v\u1ea5n \u0111\u1ec1 g\u00ec, c\u00f3 ngh\u0129a l\u00e0 b\u00ean trong d\u00e2y d\u1eabn kh\u00f4ng c\u00f3 d\u00f2ng \u0111i\u1ec7n.<\/p>\n\n\n\n \u0110\u00e1p \u00e1n b\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m<\/p>\n\n\n\n B\u00e0i 1: B<\/p>\n\n\n\n B\u00e0i 2: B<\/p>\n\n\n\n B\u00e0i 3: B<\/p>\n\n\n\n B\u00e0i t\u1eadp v\u1ec1 t\u00e1c d\u1ee5ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin m\u00e0 ch\u00fang t\u00f4i mang \u0111\u1ebfn cho c\u00e1c b\u1ea1n \u0111\u1ecdc v\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u2013 t\u1eeb tr\u01b0\u1eddng. Tin r\u1eb1ng qua nh\u1eefng chia s\u1ebb b\u1ed5 \u00edch n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 b\u1ed5 sung th\u00eam ki\u1ebfn th\u1ee9c c\u1ea7n c\u00f3 cho m\u00ecnh. V\u1eadt l\u00fd 9 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 kh\u00f3 nh\u1eb1n, nh\u01b0ng n\u1ebfu c\u00f3 ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc<\/a> t\u1eadp h\u1ee3p l\u00fd, ch\u1eafc ch\u1eafn b\u1ea1n s\u1ebd c\u1ea3m th\u1ea5y th\u00fa v\u1ecb v\u00e0 kh\u00f4ng kh\u00f4 khan \u0111\u1ebfn nh\u01b0 v\u1eady. \u0110\u1eebng qu\u00ean gh\u00e9 qua trang web c\u1ee7a ch\u00fang t\u00f4i v\u00e0 tham kh\u1ea3o th\u00ea<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":" Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn C\u00e1c em h\u1ecdc sinh l\u1edbp 9 c\u00f3 l\u1ebd \u0111\u00e3 qu\u00e1 quen v\u1edbi nh\u1eefng kh\u00e1i ni\u1ec7m v\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb. Trong nh\u1eefng ch\u01b0\u01a1ng tr\u00ecnh n\u0103m h\u1ecdc l\u1edbp 7, c\u00e1c em c\u00f3 th\u1ec3 \u0111\u00e3 bi\u1ebft \u0111\u1ebfn th\u00ed nghi\u1ec7m cu\u1ed9n d\u00e2y c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua. C\u00e2u h\u1ecfi \u0111\u1eb7t ra l\u00e0 ch\u1ec9 […]<\/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":[4,7],"tags":[],"class_list":["post-1199","post","type-post","status-publish","format-standard","hentry","category-trung-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1199","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=1199"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1199\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}