Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Trong s\u1ed1 c\u00e1c lo\u1ea1i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n, \u0111\u00f2n b\u1ea9y \u0111\u01b0\u1ee3c coi l\u00e0 lo\u1ea1i m\u00e1y c\u01a1 \u0111em \u0111\u1ebfn nhi\u1ec1u l\u1ee3i \u00edch th\u1ef1c t\u1ebf. \u0110\u00f2n b\u1ea9y gi\u00fap cho vi\u1ec7c n\u00e2ng v\u1eadt tr\u1edf l\u00ean d\u1ec5 d\u00e0ng h\u01a1n. \u0110\u00f4i khi c\u00f3 th\u1ec3 n\u00e2ng nhi\u1ec1u v\u1eadt c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng l\u1edbn h\u01a1n. Tuy nhi\u00ean, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ef1c s\u1ef1 \u0111\u00fang hay kh\u00f4ng? Ch\u00fang ta c\u1ea7n ph\u1ea3i t\u00ecm hi\u1ec3u chi ti\u1ebft v\u1ec1 \u0111\u00f2n b\u1ea9y v\u00e0 t\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y \u0111\u1ec3 c\u00f3 th\u1ec3 n\u00f3i l\u00ean \u0111i\u1ec1u n\u00e0y. B\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay, ch\u00fang ta h\u00e3y c\u00f9ng nhau l\u00fd gi\u1ea3i v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y nh\u00e9!<\/p>\n\n\n\n
\u0110\u00f2n b\u1ea9y l\u00e0 g\u00ec?<\/p>\n\n\n\n
N\u1ebfu c\u00e1c em \u0111\u00e3 t\u00ecm hi\u1ec3u qua \u1edf b\u00e0i vi\u1ebft tr\u01b0\u1edbc, ch\u1eafc h\u1eb3n c\u00e1c em \u0111\u00e3 c\u00f3 nh\u1eefng h\u00ecnh dung chung v\u1ec1 \u0111\u00f2n b\u1ea9y. \u0110\u00e2y l\u00e0 m\u1ed9t trong s\u1ed1 c\u00e1c lo\u1ea1i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong cu\u1ed9c s\u1ed1ng hi\u1ec7n nay. \u0110\u00f2n b\u1ea9y l\u00e0 m\u1ed9t v\u1eadt r\u1eafn \u0111\u01b0\u1ee3c con ng\u01b0\u1eddi s\u1eed d\u1ee5ng l\u00e0m \u0111i\u1ec3m t\u1ef1a. Th\u00f4ng qua \u0111\u00f3 \u0111\u1ec3 gi\u1ea3m b\u1edbt s\u1ef1 \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c khi n\u00e2ng ho\u1eb7c di chuy\u1ec3n v\u1ecb tr\u00ed c\u1ee7a v\u1eadt n\u1eb7ng. \u0110\u00f2n b\u1ea9y c\u00f3 c\u1ea5u t\u1ea1o v\u00f4 c\u00f9ng \u0111\u01a1n gi\u1ea3n bao g\u1ed3m m\u1ed9t thanh c\u1ee9ng v\u00e0 m\u1ed9t \u0111i\u1ec3m t\u1ef1a. T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y \u0111em l\u1ea1i r\u1ea5t nhi\u1ec1u l\u1ee3i \u00edch cho con ng\u01b0\u1eddi.<\/p>\n\n\n\n
M\u00f4 h\u00ecnh \u0111\u00f2n b\u1ea9y<\/p>\n\n\n\n
Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i ai trong s\u1ed1 ch\u00fang ta c\u0169ng c\u00f3 th\u1ec3 hi\u1ec3u h\u1ebft v\u1ec1 lo\u1ea1i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n n\u00e0y. Trong cu\u1ed9c s\u1ed1ng, c\u00f3 th\u1ec3 c\u00e1c em b\u1eaft g\u1eb7p r\u1ea5t nhi\u1ec1u lo\u1ea1i \u0111\u00f2n b\u1ea9y v\u1edbi h\u00ecnh d\u00e1ng kh\u00e1c nhau. T\u1ea1i c\u00e1c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng, thi c\u00f4ng l\u1eafp \u0111\u1eb7t ng\u01b0\u1eddi ta c\u0169ng s\u1eed d\u1ee5ng \u0111\u1ec3 di chuy\u1ec3n v\u1eadt r\u1ea5t nhi\u1ec1u. H\u00ecnh d\u00e1ng v\u00e0 c\u1ea5u t\u1ea1o c\u1ee7a \u0111\u00f2n b\u1ea9y c\u00f3 th\u1ec3 thay \u0111\u1ed5i c\u1ea7u k\u1ef3 h\u01a1n, ch\u1eafc ch\u1eafn h\u01a1n. S\u1ef1 thay \u0111\u1ed5i v\u1ec1 h\u00ecnh d\u00e1ng c\u1ea5u t\u1ea1o c\u00f3 th\u1ec3 t\u0103ng th\u00eam t\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y.<\/p>\n\n\n\n
Ph\u00e2n t\u00edch l\u1ef1c c\u1ee7a \u0111\u00f2n b\u1ea9y<\/p>\n\n\n\n
Gi\u1ed1ng nh\u01b0 l\u1eddi nh\u00e0 b\u00e1c h\u1ecdc Archimedes \u0111\u00e3 t\u1eebng n\u00f3i: \u201cH\u00e3y cho t\u00f4i m\u1ed9t \u0111i\u1ec3m t\u1ef1a, t\u00f4i c\u00f3 th\u1ec3 n\u00e2ng c\u1ea3 th\u1ebf gi\u1edbi.\u201d Vi\u1ec7c s\u1eed d\u1ee5ng lo\u1ea1i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n n\u00e0y \u0111\u1ec3 n\u00e2ng v\u1eadt th\u1eadt s\u1ef1 \u0111em \u0111\u1ebfn t\u00e1c d\u1ee5ng t\u1ed1t. T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y m\u00e0 ch\u00fang ta d\u1ec5 d\u00e0ng nh\u1eadn ra nh\u1ea5t \u0111\u00f3 ch\u00ednh l\u00e0 gi\u1ea3m b\u1edbt l\u1ef1c n\u00e2ng khi n\u00e2ng v\u1eadt. N\u1ebfu ch\u00fang ta n\u00e2ng v\u1eadt l\u00ean theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng, ch\u00fang ta s\u1ebd ph\u1ea3i b\u1ecf ra m\u1ed9t l\u1ef1c n\u00e2ng F b\u1eb1ng P \u2013 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt. Tuy nhi\u00ean, khi s\u1eed d\u1ee5ng \u0111\u00f2n b\u1ea9y l\u1ef1c F n\u00e2ng th\u1ef1c t\u1ebf s\u1ebd nh\u1ecf h\u01a1n P c\u1ee7a v\u1eadt.<\/p>\n\n\n\n
T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 m\u1eb7t ph\u1eb3ng nghi\u00eang<\/p><\/blockquote>\n\n\n\n
C\u1ea5u t\u1ea1o c\u1ee7a \u0111\u00f2n b\u1ea9y<\/p>\n\n\n\n
T\u00ecm hi\u1ec3u v\u1ec1 c\u1ea5u t\u1ea1o v\u00e0 t\u00e1c d\u1ee5ng l\u1ef1c c\u1ee7a \u0111\u00f2n b\u1ea9y, c\u00e1c em s\u1ebd d\u1ec5 d\u00e0ng v\u1eadn d\u1ee5ng v\u00e0o th\u1ef1c t\u1ebf h\u01a1n. \u0110\u00f2n b\u1ea9y l\u00e0 m\u1ed9t lo\u1ea1i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n, n\u00ean c\u1ea5u t\u1ea1o c\u1ee7a \u0111\u00f2n b\u1ea9y c\u0169ng v\u00f4 c\u00f9ng d\u1ec5 hi\u1ec3u. Ch\u00fang ta c\u1ea7n chu\u1ea9n b\u1ecb m\u1ed9t c\u1ea7n c\u1ea9u v\u1eadt ho\u1eb7c m\u1eb7t ph\u1eb3ng c\u1ee9ng nh\u01b0 t\u1ea5m v\u00e1n \u0111\u1ec3 n\u00e2ng v\u1eadt. \u0110i\u1ec3m t\u1ef1a cho \u0111\u00f2n b\u1ea9y th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn l\u00e0 v\u1eadt c\u1ee9ng, \u0111\u1ee7 \u0111\u1ec3 ch\u1ecbu l\u1ef1c t\u00e1c d\u1ee5ng khi n\u00e2ng v\u1eadt. T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y c\u00f3 l\u1edbn hay kh\u00f4ng ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o c\u00e1ch ch\u00fang ta l\u1ef1a ch\u1ecdn \u0111i\u1ec3m t\u1ef1a.<\/p>\n\n\n\n
\u1ee8ng d\u1ee5ng c\u1ee7a m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n<\/p>\n\n\n\n
C\u1ea5u t\u1ea1o chung, ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a \u0111\u00f2n b\u1ea9y s\u1ebd g\u1ed3m:<\/p>\n\n\n\n
\u0110i\u1ec3m t\u1ef1a O<\/p>\n\n\n\n
\u0110i\u1ec3m t\u00e1c d\u1ee5ng c\u1ea7n n\u00e2ng c\u1ee7a l\u1ef1c F1 t\u1ea1i O1<\/p>\n\n\n\n
\u0110i\u1ec3m t\u00e1c d\u1ee5ng c\u1ea7n n\u00e2ng c\u1ee7a l\u1ef1c F2 t\u1ea1i O2<\/p>\n\n\n\n
N\u1ebfu: OO2 > OO1 th\u00ec F2 < F1<\/p>\n\n\n\n
Th\u00f4ng th\u01b0\u1eddng, \u0111i\u1ec3m t\u1ef1a O s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t c\u00f9ng m\u1ed9t thanh c\u1ee9ng \u0111\u1ec3 n\u00e2ng v\u1eadt d\u1ec5 d\u00e0ng h\u01a1n. \u0110\u00f3 c\u0169ng ch\u00ednh l\u00e0 l\u00fd do v\u00ec sao ch\u00fang ta c\u1ea7n ph\u1ea3i ch\u1ecdn \u0111i\u1ec3m t\u1ef1a ch\u1eafc ch\u1eafn. N\u1ebfu kh\u00f4ng trong qu\u00e1 tr\u00ecnh n\u00e2ng v\u1eadt c\u00f3 th\u1ec3 x\u1ea3y ra s\u1ef1 c\u1ed1. T\u1ed1t nh\u1ea5t \u0111i\u1ec3m t\u1ef1a c\u1ee7a \u0111\u00f2n b\u1ea9y n\u00ean \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh. \u0110i\u1ec3m t\u1ef1a c\u00f3 th\u1ec3 c\u00f3 tr\u1ee5c xoay \u0111\u1ec3 thay \u0111\u1ed5i h\u01b0\u1edbng n\u00e2ng l\u00ean c\u00e1c v\u1ecb tr\u00ed kh\u00e1c d\u1ec5 d\u00e0ng h\u01a1n. Tuy nhi\u00ean, khi c\u1ed1 \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a \u0111i\u1ec3m t\u1ef1a xong xu\u00f4i. Ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n n\u00e2ng \u0111\u1ed3 v\u1eadt c\u0169ng s\u1ebd tr\u1edf n\u00ean d\u1ec5 d\u00e0ng. L\u1ef1c n\u00e2ng khi ch\u00fang ta t\u00e1c d\u1ee5ng l\u00ean \u0111\u00f2n b\u1ea9y s\u1ebd \u0111\u01b0\u1ee3c d\u1ed3n v\u00e0o c\u1ea7n n\u00e2ng. Sau \u0111\u00f3 c\u1ed9ng l\u1ef1c v\u1edbi \u0111i\u1ec3m t\u1ef1a \u0111\u1ec3 gi\u00fap n\u00e2ng v\u1eadt l\u00ean d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n\n\n\n
S\u1eed d\u1ee5ng \u0111\u00f2n b\u1ea9y trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y<\/p>\n\n\n\n
T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y trong cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. C\u00e1c em c\u0169ng c\u00f3 th\u1ec3 t\u1ef1 l\u00e0m cho m\u00ecnh m\u1ed9t chi\u1ebfc \u0111\u00f2n b\u1ea9y c\u01a1 b\u1ea3n \u0111\u1ec3 s\u1eed d\u1ee5ng h\u1eb1ng ng\u00e0y trong vi\u1ec7c n\u00e2ng v\u1eadt. Tr\u00ean l\u1edbp, c\u00e1c em c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eefng th\u00ed nghi\u1ec7m v\u1ec1 \u0111\u00f2n b\u1ea9y. C\u00e1c em c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u k\u1ef9 h\u01a1n v\u1ec1 c\u1ea5u t\u1ea1o khi th\u1ef1c hi\u1ec7n trong th\u1ef1c t\u1ebf.<\/p>\n\n\n\n
C\u00e1c lo\u1ea1i \u0111\u00f2n b\u1ea9y th\u00f4ng d\u1ee5ng<\/p>\n\n\n\n
C\u00f3 3 lo\u1ea1i \u0111\u00f2n b\u1ea9y c\u01a1 b\u1ea3n th\u00f4ng d\u1ee5ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u hi\u1ec7n nay. C\u00e1c em n\u00ean n\u1eafm r\u00f5 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u00e1c lo\u1ea1i \u0111\u00f2n b\u1ea9y \u0111\u1ec3 s\u1eed d\u1ee5ng trong t\u1eebng t\u00ecnh hu\u1ed1ng. \u0110\u1ec3 vi\u1ec7c t\u00ecm hi\u1ec3u \u0111\u01a1n gi\u1ea3n h\u01a1n, c\u00e1c em c\u1ea7n nh\u1edb c\u00e1c k\u00ed hi\u1ec7u sau \u0111\u00e2y:<\/p>\n\n\n\n
\u0110i\u1ec3m t\u1ef1a O<\/p>\n\n\n\n
V\u1eadt c\u1ea7n n\u00e2ng R<\/p>\n\n\n\n
L\u1ef1c t\u00e1c \u0111\u1ed9ng \u2013 k\u00fd hi\u1ec7u l\u00e0 AF.<\/p>\n\n\n\n
Kho\u1ea3ng c\u00e1ch gi\u1eefa O v\u00e0 R g\u1ecdi l\u00e0 a; kho\u1ea3ng c\u00e1ch gi\u1eefa O v\u00e0 AF g\u1ecdi l\u00e0 b<\/p>\n\n\n\n
Lo\u1ea1i 1: \u0110i\u1ec3m t\u1ef1a \u1edf gi\u1eefa v\u1eadt c\u1ea7n n\u00e2ng v\u00e0 l\u1ef1c t\u00e1c \u0111\u1ed9ng<\/p>\n\n\n\n
\u0110\u00e2y l\u00e0 lo\u1ea1i \u0111\u00f2n b\u1ea9y \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u nhi\u1ec1u trong s\u00e1ch gi\u00e1o khoa c\u0169ng nh\u01b0 th\u1ef1c hi\u1ec7n tr\u00ean l\u1edbp c\u1ee7a c\u00e1c em. \u0110i\u1ec3m t\u1ef1a c\u1ee7a \u0111\u00f2n b\u1ea9y \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp \u1edf v\u1ecb tr\u00ed ch\u00ednh gi\u1eefa so v\u1edbi hai \u0111i\u1ec3m v\u1eadt c\u1ea7n n\u00e2ng R v\u00e0 l\u1ef1c t\u00e1c \u0111\u1ed9ng AF. Khi v\u1ecb tr\u00ed \u0111i\u1ec3m O \u1edf ch\u00ednh gi\u1eefa th\u00ec nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u00f2n b\u1ea9y c\u0169ng s\u1ebd thay \u0111\u1ed5i.<\/p>\n\n\n\n
C\u00e1ch \u0111\u1eb7t \u0111i\u1ec3m t\u1ef1a v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u00f2n b\u1ea9y lo\u1ea1i n\u00e0y nh\u01b0 sau: Trong tr\u01b0\u1eddng h\u1ee3p kho\u1ea3ng c\u00e1ch b c\u00e0ng l\u1edbn. L\u1ef1c t\u00e1c \u0111\u1ed9ng n\u00e2ng R khi n\u00e2ng v\u1eadt th\u1ef1c t\u1ebf s\u1ebd nh\u1ecf h\u01a1n. Tuy nhi\u00ean, \u0111i\u1ec1u \u0111\u00f3 s\u1ebd khi\u1ebfn R di chuy\u1ec3n ch\u1eadm h\u01a1n. N\u1ebfu ta \u0111\u1eb7t O l\u1ea1i g\u1ea7n AF \u0111\u1ec3 b nh\u1ecf th\u00ec l\u1ef1c AF s\u1ebd ph\u1ea3i l\u1edbn h\u01a1n v\u00e0 R c\u0169ng s\u1ebd di chuy\u1ec3n nhanh h\u01a1n tr\u01b0\u1eddng h\u1ee3p 1.<\/p>\n\n\n\n
T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y<\/p>\n\n\n\n
Lo\u1ea1i 2: V\u1eadt c\u1ea7n n\u00e2ng \u1edf gi\u1eefa l\u1ef1c t\u00e1c \u0111\u1ed9ng v\u00e0 \u0111i\u1ec3m t\u1ef1a<\/p>\n\n\n\n
Lo\u1ea1i \u0111\u00f2n b\u1ea9y n\u00e0y c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m kh\u00e1c h\u01a1n so v\u1edbi lo\u1ea1i 1. V\u1eadt c\u1ea7n n\u00e2ng l\u00fac n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf gi\u1eefa. \u0110i\u1ec3m t\u1ef1a O s\u1ebd \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn \u1edf v\u1ecb tr\u00ed kh\u00e1c. L\u00fac n\u00e0y, trong m\u1ecdi tr\u01b0\u1eddng h\u1ee3p, ta s\u1ebd th\u1ea5y a lu\u00f4n nh\u1ecf h\u01a1n b. V\u00ec th\u1ebf m\u00e0 lo\u1ea1i \u0111\u00f2n b\u1ea9y n\u00e0y c\u00f3 th\u1ec3 n\u00e2ng \u0111\u01b0\u1ee3c nhi\u1ec1u v\u1eadt n\u1eb7ng nh\u01b0ng c\u00f3 nh\u01b0\u1ee3c \u0111i\u1ec3m l\u00e0 t\u1ed1c \u0111\u1ed9 s\u1ebd ch\u1eadm.<\/p>\n\n\n\n
V\u00ed d\u1ee5 ti\u00eau bi\u1ec3u nh\u1ea5t cho \u0111\u00f2n b\u1ea9y lo\u1ea1i 2 \u0111\u00f3 l\u00e0 xe \u0111\u1ea9y c\u00fat k\u00edt th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong x\u00e2y d\u1ef1ng. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 nh\u1eefng v\u00ed d\u1ee5 th\u1ef1c t\u1ebf trong cu\u1ed9c s\u1ed1ng m\u00e0 ch\u00fang ta hay g\u1eb7p. \u0110\u00f4i khi ch\u00fang ta kh\u00f4ng h\u1ec1 ngh\u0129 \u0111\u00e2y l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u1ee9ng d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y. T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y \u0111em \u0111\u1ebfn r\u1ea5t nhi\u1ec1u l\u1ee3i \u00edch trong ho\u1ea1t \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n\n\n\n
Lo\u1ea1i 3: L\u1ef1c t\u00e1c \u0111\u1ed9ng \u1edf gi\u1eefa v\u1eadt n\u00e2ng v\u00e0 \u0111i\u1ec3m t\u1ef1a<\/p>\n\n\n\n
L\u00fac n\u00e0y l\u1ef1c AF s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf gi\u1eefa. V\u1eadt n\u00e2ng R v\u00e0 \u0111i\u1ec3m t\u1ef1a O \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf hai b\u00ean. V\u1edbi lo\u1ea1i \u0111\u00f2n b\u1ea9y n\u00e0y, a s\u1ebd l\u1edbn h\u01a1n b. V\u00ec th\u1ebf n\u00f3 c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 gi\u00fap d\u1ecbch chuy\u1ec3n v\u1eadt c\u1ea7n n\u00e2ng nhanh v\u00e0 d\u1ec5 d\u00e0ng h\u01a1n. Tuy nhi\u00ean, nh\u01b0\u1ee3c \u0111i\u1ec3m l\u00e0 b\u1ea1n s\u1ebd ph\u1ea3i d\u00f9ng nhi\u1ec1u s\u1ee9c h\u01a1n. Trong th\u1ef1c t\u1ebf s\u1ebd \u00edt c\u00f3 tr\u01b0\u1eddng h\u1ee3p n\u00e0o s\u1eed d\u1ee5ng lo\u1ea1i \u0111\u00f2n b\u1ea9y n\u00e0y. Tuy nhi\u00ean trong c\u00e1c b\u00e0i t\u1eadp v\u1ec1 ph\u00e2n t\u00edch l\u1ef1c tr\u00ean l\u1edbp. C\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn tr\u01b0\u1eddng h\u1ee3p n\u00e0y. \u0110\u00f4i khi, c\u00e1c em s\u1ebd ph\u1ea3i l\u00e0m b\u00e0i t\u1eadp di chuy\u1ec3n v\u1ecb tr\u00ed c\u1ee7a \u0111i\u1ec3m t\u1ef1a \u0111\u1ec3 \u0111em \u0111\u1ebfn t\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n
T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 r\u00f2ng r\u1ecdc c\u1ed1 \u0111\u1ecbnh<\/p><\/blockquote>\n\n\n\n
C\u00e1ch h\u1ecdc t\u1eadp<\/a> v\u1eadt l\u00fd t\u1ed1t<\/p>\n\n\n\n
Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i \u0111\u00f2n b\u1ea9y, ph\u00e2n t\u00edch l\u1ef1c t\u00e1c \u0111\u1ed9ng ch\u00ednh x\u00e1c. C\u00e1c em s\u1ebd l\u00e0m b\u00e0i t\u1eadp nhanh ch\u00f3ng v\u00e0 ch\u00ednh x\u00e1c. C\u00e1c em n\u00ean ghi ch\u00e9p l\u1ea1i nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y \u0111\u1ec3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng. T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y kh\u00f4ng ch\u1ec9 l\u00e0m gi\u1ea3m b\u1edbt l\u1ef1c t\u00e1c \u0111\u1ed9ng \u0111\u1ec3 n\u00e2ng v\u1eadt. M\u00e0 \u0111\u00f4i khi c\u00f2n \u0111\u00f2n b\u1ea9y c\u00f2n \u0111em \u0111\u1ebfn t\u00e1c d\u1ee5ng di chuy\u1ec3n \u0111\u1ebfn v\u1ecb tr\u00ed kh\u00e1c nhanh h\u01a1n, d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n\n\n\n
C\u00f3 th\u1ec3 n\u00f3i, \u0111\u00f2n b\u1ea9y ch\u00ednh l\u00e0 lo\u1ea1i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t trong cu\u1ed9c s\u1ed1ng hi\u1ec7n nay. T\u00e1c d\u1ee5ng c\u1ee7a \u0111\u00f2n b\u1ea9y \u0111em l\u1ea1i nhi\u1ec1u \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf. \u0110\u00e2y ch\u00ednh l\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y ch\u00fang t\u00f4i \u0111em \u0111\u1ebfn cho c\u00e1c em. Hy v\u1ecdng nh\u1eefng th\u00f4ng tin n\u00e0y c\u00f3 th\u1ec3 gi\u00fap \u00edch cho em trong vi\u1ec7c h\u1ecdc t\u1eadp<\/a> v\u00e0 cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y. C\u1ea3m \u01a1n c\u00e1c em \u0111\u00e3 \u0111\u00f3n \u0111\u1ecdc b\u00e0i vi\u1ebft. Nh\u1eefng b\u00e0i vi\u1ebft m\u1edbi v\u1ec1 v\u1eadt l\u00fd v\u1eabn \u0111ang \u0111\u01b0\u1ee3c \u0111\u0103ng t\u1ea3i tr\u00ean trang ch\u1ee7. C\u00e1c em h\u00e3y \u0111\u00f3n xem nh\u1eefng b\u00e0i vi\u1ebft m\u1edbi nh\u1ea5t nh\u00e9!<\/p>\n\n\n\n
\u0110\u1ecdc th\u00eam c\u00e1c b\u00e0i vi\u1ebft kh\u00e1c c\u00f3 c\u00f9ng ch\u1ee7 \u0111\u1ec1<\/p><\/blockquote>\n\n\n\n
V\u1eadt l\u00fd 6: T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c?<\/p>\n\n\n\n
V\u1eadt l\u00fd 6: T\u00ecm hi\u1ec3u v\u1ec1 hai l\u1ef1c c\u00e2n b<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Trong s\u1ed1 c\u00e1c lo\u1ea1i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n, \u0111\u00f2n b\u1ea9y \u0111\u01b0\u1ee3c coi l\u00e0 lo\u1ea1i m\u00e1y c\u01a1 \u0111em \u0111\u1ebfn nhi\u1ec1u l\u1ee3i \u00edch th\u1ef1c t\u1ebf. \u0110\u00f2n b\u1ea9y gi\u00fap cho vi\u1ec7c n\u00e2ng v\u1eadt tr\u1edf l\u00ean d\u1ec5 d\u00e0ng h\u01a1n. \u0110\u00f4i khi c\u00f3 th\u1ec3 n\u00e2ng nhi\u1ec1u v\u1eadt c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng l\u1edbn h\u01a1n. Tuy nhi\u00ean, […]<\/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-1153","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\/1153","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=1153"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1153\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}