Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n L\u00fd<\/p>\n<\/div>\n
C\u00e2u 8:<\/strong>M\u1ed9t con l\u1eafc l\u00f2 xo c\u00f3 \u0111\u1ed9 c\u1ee9ng k = 40N\/m \u0111\u1ea7u tr\u00ean \u0111\u01b0\u1ee3c gi\u1eef c\u1ed1 \u0111\u1ecbnh c\u00f2n ph\u00eda d\u01b0\u1edbi g\u1eafn v\u1eadt m. Nang m l\u00ean \u0111\u1ebfn v\u1ecb tr\u00ed l\u00f2 xo kh\u00f4ng bi\u1ebfn d\u1ea1ng r\u1ed3i th\u1ea3 nh\u1eb9 \u0111\u1ec3 v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng v\u1edbi bi\u00ean \u0111\u1ed9 5cm. L\u1ea5y g = 10m\/s2. Trong qu\u00e1 tr\u00ecnh dao \u0111\u1ed9ng, tr\u1ecdng l\u1ef1c c\u1ee7a m c\u00f3 c\u00f4ng su\u1ea5t t\u1ee9c th\u1eddi c\u1ef1c \u0111\u1ea1i b\u1eb1ng<\/p>\n A. 0,4 W B. 0,32W C. 0,5W D. \u221a2 W<\/p>\n C\u00e2u 9:<\/strong>Cho m\u1ea1ch \u0111i\u1ec7n RC n\u1ed1i ti\u1ebfp; u = 220 \u221a2 sin \u03c9t (V), R thay \u0111\u1ed5i \u0111\u01b0\u1ee3c, c\u00f3 hai gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf R<\/p>\n = 30 \u2126, R<\/p>\n = 50 \u2126 c\u00f4ng su\u1ea5t \u0111\u1ec1u b\u1eb1ng nhau. C\u00f4ng su\u1ea5t \u0111\u00f3 nh\u1eadn gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y:<\/p>\n A. 80 W B. 600 W C. 605 W D. 220 W.<\/p>\n C\u00e2u 10:<\/strong>M\u1ed9t c\u1ea3ng bi\u1ec3n, m\u1ef1c n\u01b0\u1edbc th\u1ee7y tri\u1ec1u l\u00ean xu\u1ed1ng theo ki\u1ec3u dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. \u0110\u1ed3 th\u1ecb bi\u1ec3u di\u1ec5n \u0111\u1ed9 s\u00e2u c\u1ee7a c\u1ea3ng theo th\u1eddi gian \u0111\u01b0\u1ee3c cho b\u1edfi \u0111\u1ed3 th\u1ecb h\u00ecnh v\u1ebd. M\u1ed9t t\u00e0u \u0111\u1ebfn \u0111\u1ec3 c\u1eadp c\u1ea3ng v\u00e0o l\u00fac n\u01b0\u1edbc c\u1ea1n nh\u1ea5t. \u0110\u1ec3 v\u00e0o c\u1ea3ng an to\u00e0n th\u00ec m\u1ee9c n\u01b0\u1edbc ph\u1ea3i c\u00f3 \u0111\u1ed9 s\u00e2u \u00edt nh\u1ea5t l\u00e0 1,5 m. T\u00e0u ph\u1ea3i neo \u0111\u1eadu \u1edf c\u1ea3ng bao l\u00e2u?<\/p>\n A. 1,5h B. 2h. C.3h D. 6h.<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n T\u1ea5t c\u1ea3 n\u1ed9i dung b\u00e0i vi\u1ebft. C\u00e1c em h\u00e3y xem th\u00eam v\u00e0 t\u1ea3i file chi ti\u1ebft t\u1ea1i \u0111\u00e2y:<\/strong>Download<\/p>\n","protected":false},"excerpt":{"rendered":" Tr\u01b0\u1eddng THPT Ph\u1ea3 L\u1ea1i, t\u1ec9nh H\u1ea3i D\u01b0\u01a1ng t\u1ed5 ch\u1ee9c thi th\u1eed THPT Qu\u1ed1c gia n\u0103m 2016 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt d\u01b0\u1edbi \u0111\u00e2y. \u0110\u1ec1 thi g\u1ed3m 5 trang c\u1ee5 th\u1ec3 nh\u01b0 sau: Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n L\u00fd \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia 2016 m\u00f4n L\u00fd THPT Ph\u1ea3 L\u1ea1i – H\u1ea3i D\u01b0\u01a1ng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[25],"tags":[],"yoast_head":"\n