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C\u00e2u 1 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Ph\u00e1t bi\u1ec3u hai ti\u00ean \u0111\u1ec1 Anh \u2013 xtanh.<\/span><\/p>\n

C\u00e2u 2 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0N\u00eau v\u1eafn t\u1eaft hai h\u1ec7 qu\u1ea3 c\u1ee7a thuy\u1ebft t\u01b0\u01a1ng \u0111\u1ed1i h\u1eb9p.<\/span><\/p>\n

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\u00a0B\u00c0I T\u1eacP<\/strong><\/div>\n
<\/div>\n
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B\u00e0i 1 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Khi ngu\u1ed3n s\u00e1ng chuy\u1ec3n \u0111\u1ed9ng, v\u1eadn t\u1ed1c truy\u1ec1n \u00e1nh s\u00e1ng trong ch\u00e2n kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb.<\/span><\/p>\n
A. Nh\u1ecf h\u01a1n c.<\/p>\n
B. L\u1edbn h\u01a1n c.<\/p>\n
C. L\u1edbn h\u01a1n ho\u1eb7c nh\u1ecf h\u01a1n c, ph\u1ee5 thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng truy\u1ec1n v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a ngu\u1ed3n.<\/p>\n
D. Lu\u00f4n b\u1eb1ng c, kh\u00f4ng ph\u1ee5 thu\u1ed9c ph\u01b0\u01a1ng truy\u1ec1n v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a ngu\u1ed3n.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn D<\/p>\n
B\u00e0i 2 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Khi m\u1ed9t c\u00e1i th\u01b0\u1edbc chuy\u1ec3n \u0111\u1ed9ng d\u1ecdc theo ph\u01b0\u01a1ng chi\u1ec1u d\u00e0i c\u1ee7a n\u00f3, \u0111\u1ed9 d\u00e0i c\u1ee7a th\u01b0\u1edbc \u0111o trong h\u1ec7 qu\u00e1n t\u00ednh K.<\/span><\/p>\n
A. Kh\u00f4ng thay \u0111\u1ed5i.<\/p>\n
B. Co l\u1ea1i, t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi v\u1eadn t\u1ed1c c\u1ee7a th\u01b0\u1edbc.<\/p>\n
C. D\u00e3n ra, ph\u1ee5 thu\u1ed9c v\u00e0o v\u1eadn t\u1ed1c chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a th\u01b0\u1edbc.<\/p>\n
D. Co l\u1ea1i theo t\u1ec9 l\u1ec7:<\/p>\n
$\"\"$ <\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn D<\/p>\n
B\u00e0i 3 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0T\u00ednh \u0111\u1ed9 c\u00f3 chi\u1ec1u d\u00e0i c\u1ee7a m\u1ed9t c\u00e1i th\u01b0\u1edbc c\u00f3 chi\u1ec1u d\u00e0i ti\u00eang b\u1eb1ng 30 cm, chuy\u1ec3n \u0111\u1ed9ng v\u1edbi v\u1eadn t\u1ed1c v=0,8c.<\/span><\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ta c\u00f3:<\/p>\n
$\"\"$ <\/p>\n
\u0110\u1ed9 co chi\u1ec1u d\u00e0i : \u2206l = l_{0<\/sub>\u00a0– l = 30 – 18 = 12 cm<\/p>\n}
\n
\n
B\u00e0i 4 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0M\u1ed9t \u0111\u1ed3ng h\u1ed3 chuy\u1ec3n \u0111\u1ed9ng v\u1edbi v\u1eadn t\u1ed1c v=0,8c. H\u1ecfi sau 30 ph\u00fat (t\u00ednh theo \u0111\u1ed3ng h\u1ed3 \u0111\u00f3) th\u00ec \u0111\u1ed3ng h\u1ed3 n\u00e0y ch\u1ea1y ch\u1eadm h\u01a1n \u0111\u1ed3ng h\u1ed3 g\u1eafn v\u1edbi quan s\u00e1t vi\u00ean \u0111\u1ee9ng y\u00ean bao nhi\u00eau gi\u00e2y.<\/span><\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ta c\u00f3:<\/p>\n
$\"\"$ <\/p>\n
V\u1eady \u0111\u1ed3ng h\u1ed3 chuy\u1ec3n \u0111\u1ed9ng \u0111\u00e3 ch\u1ea1y ch\u1eadm h\u01a1n l\u00e0 \u2206I = 3000 – 1800 = 1200 s.<\/p>\n<\/div>\n<\/div>\n
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<\/div>\n<\/div>\n<\/div>\n<\/div>\n
<\/div>\n
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<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
C\u00c2U H\u1eceI C\u00e2u 1 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Ph\u00e1t bi\u1ec3u hai ti\u00ean \u0111\u1ec1 Anh \u2013 xtanh. L\u1eddi gi\u1ea3i: Xem m\u1ee5c 2 ph\u1ea7n KTCB. C\u00e2u 2 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0N\u00eau v\u1eafn t\u1eaft hai h\u1ec7 qu\u1ea3 c\u1ee7a thuy\u1ebft t\u01b0\u01a1ng \u0111\u1ed1i h\u1eb9p. L\u1eddi gi\u1ea3i: Xem m\u1ee5c 3 ph\u1ea7n KTCB. \u00a0B\u00c0I T\u1eacP […]<\/p>\n","protected":false},"author":3,"featured_media":24994,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1304],"tags":[1432,1431],"yoast_head":"\nCh\u01b0\u01a1ng 8 - B\u00e0i 50: Thuy\u1ebft t\u01b0\u01a1ng \u0111\u1ed1i h\u1eb9p<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/chuong-8-bai-50-thuyet-tuong-doi-hep\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 8 - B\u00e0i 50: Thuy\u1ebft t\u01b0\u01a1ng \u0111\u1ed1i h\u1eb9p\" \/>\n<meta property=\"og:description\" content=\"C\u00c2U H\u1eceI C\u00e2u 1 (trang 256 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Ph\u00e1t bi\u1ec3u hai ti\u00ean \u0111\u1ec1 Anh \u2013 xtanh. 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