C\u00e2u 7:<\/b>\u00a0M\u1ed9t con l\u1eafc l\u00f2 xo dao \u0111\u1ed9ng t\u1eaft d\u1ea7n. C\u1ee9 sau m\u1ed7i chu k\u00ec, bi\u00ean \u0111\u1ed9 dao \u0111\u1ed9ng c\u1ee7a n\u00f3 gi\u1ea3m 2,5%. Ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng c\u1ee7a con l\u1eafc b\u1ecb m\u1ea5t \u0111i sau m\u1ed7i chu k\u00ec l\u00e0<\/p>\n
A. 5% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 7,5% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 6% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 9,5%<\/p>\n
C\u00e2u 8:<\/b>\u00a0V\u1ecf m\u00e1y c\u1ee7a m\u1ed9t \u0111\u1ed9ng c\u01a1 n\u1ed5 rung m\u1ea1nh d\u1ea7n l\u00ean khi tr\u1ee5c quay \u0111\u1ed9ng c\u01a1 t\u0103ng d\u1ea7n t\u1ed1c \u0111\u1ed9 quay \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 1440 v\u00f2ng\/ph\u00fat v\u00e0 gi\u1ea3m rung \u0111\u1ed9ng \u0111i khi t\u0103ng ti\u1ebfp t\u1ed1c \u0111\u1ed9 quay \u0111\u1ed9ng c\u01a1. T\u1ea7n s\u1ed1 ri\u00eang c\u1ee7a dao \u0111\u1ed9ng v\u1ecf m\u00e1y l\u00e0<\/p>\n
A. 1400 v\u00f2ng\/ph\u00fat \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 1440 v\u00f2ng\/ph\u00fat<\/p>\n
C. 1380 v\u00f2ng\/ph\u00fat \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 1420 v\u00f2ng\/ph\u00fat.<\/p>\n
C\u00e2u 9:<\/b>\u00a0C\u01a1 n\u0103ng c\u1ee7a m\u1ed9t dao \u0111\u1ed9ng t\u1eaft d\u1ea7n gi\u1ea3m 5% sau m\u1ed7i chu k\u00ec. Bi\u00ean \u0111\u1ed9 dao \u0111\u1ed9ng t\u1eaft d\u1ea7n sau m\u1ed7i chu k\u00ec gi\u1ea3m \u0111i<\/p>\n
A. 5% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 2,5% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 10% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. \u221a5% \u2248 2,24%<\/p>\n
C\u00e2u 10:<\/b>\u00a0Bi\u00ean \u0111\u1ed9 c\u1ee7a m\u1ed9t dao \u0111\u1ed9ng t\u1eaft d\u1ea7n gi\u1ea3m 1,5% sau m\u1ed7i chu k\u00ec. Trong m\u1ed9t dao \u0111\u1ed9ng to\u00e0n ph\u1ea7n, c\u01a1 n\u0103ng c\u1ee7a dao \u0111\u1ed9ng b\u1ecb m\u1ea5t \u0111i<\/p>\n
A. 3% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 4,5% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 0,75% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 2,25%.<\/p>\n
C\u00e2u 11:<\/b>\u00a0M\u1ed9t ng\u01b0\u1eddi x\u00e1ch m\u1ed9t x\u00f4 n\u01b0\u1edbc \u0111i tr\u00ean \u0111\u01b0\u1eddng, m\u1ed7i b\u01b0\u1edbc \u0111i d\u00e0i 45 cm th\u00ec n\u01b0\u1edbc trong x\u00f4 b\u1ecb s\u00f3ng s\u00e1nh m\u1ea1nh nh\u1ea5t. Chu k\u00ec dao \u0111\u1ed9ng ri\u00eang c\u1ee7a n\u01b0\u1edbc trong x\u00f4 l\u00e0 0,3 s. V\u1eadn t\u1ed1c b\u01b0\u1edbc \u0111i c\u1ee7a ng\u01b0\u1eddi \u0111\u00f3 l\u00e0<\/p>\n
A. 5,4 km\/h \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 3,6 km\/h \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 4,8 km\/h \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 4,2 km\/h<\/p>\n
H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0111\u00e1p \u00e1n<\/b><\/p>\n C\u00e2u 7:<\/b>\u00a0A<\/p>\n <\/p>\n C\u00e2u 9:<\/b>\u00a0B<\/p>\n <\/p>\n C\u00e2u 10:<\/b>\u00a0A<\/p>\n <\/p>\n C\u00e2u 11:<\/b>\u00a0A<\/p>\n N\u01b0\u1edbc trong x\u00f4 b\u1ecb s\u00f3ng s\u00e1nh m\u1ea1nh nh\u1ea5t khi t\u1ea7n s\u1ed1 (hay chu k\u00ec) k\u00edch th\u00edch c\u1ee7a ngo\u1ea1i l\u1ef1c b\u1eb1ng t\u1ea7n s\u1ed1 ri\u00eang (hay chu k\u00ec ri\u00eang) c\u1ee7a x\u00f4 n\u01b0\u1edbc :<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" C\u00e2u 7:\u00a0M\u1ed9t con l\u1eafc l\u00f2 xo dao \u0111\u1ed9ng t\u1eaft d\u1ea7n. C\u1ee9 sau m\u1ed7i chu k\u00ec, bi\u00ean \u0111\u1ed9 dao \u0111\u1ed9ng c\u1ee7a n\u00f3 gi\u1ea3m 2,5%. Ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng c\u1ee7a con l\u1eafc b\u1ecb m\u1ea5t \u0111i sau m\u1ed7i chu k\u00ec l\u00e0 A. 5% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 7,5% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 6% \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 9,5% C\u00e2u 8:\u00a0V\u1ecf m\u00e1y c\u1ee7a m\u1ed9t \u0111\u1ed9ng c\u01a1 n\u1ed5 rung m\u1ea1nh […]<\/p>\n","protected":false},"author":3,"featured_media":26339,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[158],"tags":[1445,1444],"yoast_head":"\n\n\n
\n C\u00e2u<\/td>\n 7<\/td>\n 8<\/td>\n 9<\/td>\n 10<\/td>\n 11<\/td>\n<\/tr>\n \n \u0110\u00e1p \u00e1n<\/td>\n A<\/td>\n B<\/td>\n B<\/td>\n A<\/td>\n A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n