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{"id":25151,"date":"2018-04-03T17:56:24","date_gmt":"2018-04-03T10:56:24","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=25151"},"modified":"2018-04-03T17:56:24","modified_gmt":"2018-04-03T10:56:24","slug":"chuong-3-bai-18-hieu-ung-dop-ple","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-3-bai-18-hieu-ung-dop-ple\/","title":{"rendered":"Ch\u01b0\u01a1ng 3 -B\u00e0i 18: Hi\u1ec7u \u1ee9ng \u0110\u1ed1p-ple"},"content":{"rendered":"

C\u00c2U H\u1eceI<\/strong><\/p>\n

C\u00e2u 1 (trang 101 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Gi\u1ea3i th\u00edch v\u00ec sao khi m\u00e1y thu chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n ngu\u1ed3n \u00e2m th\u00ec \u00e2m ghi nh\u1eadn \u0111\u01b0\u1ee3c l\u1ea1i c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn h\u01a1n \u00e2m ph\u00e1t ra?<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Trong m\u1ed9t th\u1eddi gian t m\u1ed9t \u0111\u1ecbnh s\u00f3ng l\u1ea1i g\u1ea7n ng\u01b0\u1eddi quan s\u00e1t m\u1ed9t \u0111o\u1ea1n \u0111\u01b0\u1eddng s = (v + v_{m<\/sub>)t. S\u1ed1 l\u1ea7n b\u01b0\u1edbc s\u00f3ng qua tai ng\u01b0\u1eddi quan s\u00e1t n = [(v – v_{m<\/sub>)t]\/\u03b1. V\u1eady trong 1s s\u1ed1 l\u1ea7n b\u01b0\u1edbc s\u00f3ng qua tai ng\u01b0\u1eddi quan s\u00e1t:<\/p>\n}}

$\"\"$ <\/p>\n

C\u00e2u 2 (trang 101 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Nh\u1eefng t\u00ednh ch\u1ea5t n\u00e0o c\u1ee7a \u00e2m s\u1ebd b\u1ecb thay \u0111\u1ed5i khi ngu\u1ed3n \u00e2m chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n m\u00e1y thu?<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Khi ngu\u1ed3n \u00e2m chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n m\u00e1y thu th\u00ec:<\/p>\n

– T\u1ea7n s\u1ed1 \u00e2m thu \u0111\u01b0\u1ee3c t\u0103ng \u21d2 \u0111\u1ed9 cao c\u1ee7a \u00e2m nge \u0111\u01b0\u1ee3c.<\/p>\n

– C\u01b0\u1eddng \u0111\u1ed9 \u00e2m thu \u0111\u01b0\u1ee3c t\u0103ng \u21d2 \u0111\u1ed9 to c\u1ee7a \u00e2m nghe \u0111\u01b0\u1ee3c t\u0103ng.<\/p>\n

B\u00c0I T\u1eacP<\/strong><\/p>\n

B\u00e0i 1 (trang 101 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Hi\u1ec7u \u1ee9ng \u0110\u1ed1p-ple g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng g\u00ec sau \u0111\u00e2y?<\/span><\/p>\n

A. Thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 \u00e2m chuy\u1ec3n \u0111\u1ed9ng so v\u1edbi ng\u01b0\u1eddi nghe.<\/p>\n

B. Thay \u0111\u1ed5i \u0111\u1ed9 cao c\u1ee7a \u00e2m khi ngu\u1ed3n \u00e2m chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n ngu\u1ed3n \u00e2m.<\/p>\n

C. Thay \u0111\u1ed5i s\u1eafc \u00e2m s\u1eafc c\u1ee7a \u00e2m khi ng\u01b0\u1eddi ta nghe chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n ngu\u1ed3n \u00e2m.<\/p>\n

D. Thay \u0111\u1ed5i c\u1ea3 \u0111\u1ed9 cao v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 \u00e2m khi ngu\u1ed3n \u00e2m chuy\u1ec3n \u0111\u1ed9ng.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn B<\/p>\n

B\u00e0i 2 (trang 101 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0o sau \u0111\u00e2y th\u00ec \u00e2m do m\u00e1y thu ghi nh\u00e2n \u0111\u01b0\u1ee3c c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn h\u01a1n t\u1ea7n s\u1ed1 c\u1ee7a \u00e2m do ngu\u1ed3n \u00e2m ph\u00e1t ra?<\/span><\/p>\n

A. Ngu\u1ed3n \u00e2m chuy\u1ec3n \u0111\u1ed9ng ra m\u00e1y thu \u0111\u1ee9ng y\u00ean.<\/p>\n

B. M\u00e1y thu chuy\u1ec3n \u0111\u1ed5nga xa ngu\u1ed3n \u00e2m \u0111\u1ee9ng y\u00ean.<\/p>\n

C. M\u00e1y thu chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n ngu\u1ed3n \u00e2m \u0111\u1ee9ng y\u00ean.<\/p>\n

D. M\u00e1y thu chuy\u1ec3n \u0111\u1ed9ng c\u00f9ng chi\u1ec1u v\u00e0 c\u00f9ng t\u1ed1c \u0111\u1ed9 ngu\u1ed3n \u00e2m.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn C<\/p>\n

B\u00e0i 3 (trang 102 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0M\u1ed9t c\u00e1i c\u00f2i ph\u00e1t s\u00f3ng \u00e2m c\u00f3 t\u1ea7n s\u1ed1 1000Hz chuy\u1ec3n \u0111\u1ed9ng \u0111i ra xa m\u1ed9t ng\u01b0\u1eddi \u0111\u1ee9ng b\u00ean \u0111\u01b0\u1eddng v\u1ec1 ph\u00eda v\u00e1ch \u0111\u00e1 v\u1edbi t\u1ed1c \u0111\u1ed9 10 m\/s. l\u1ea5y t\u1ed1c \u0111\u1ed9 \u00e2m trong kh\u00f4ng kh\u00ed l\u00e0 330 m\/s. h\u1ecfi:<\/span><\/p>\n

a) T\u1ea7n s\u1ed1 c\u1ee7a \u00e2m ng\u01b0\u1eddi \u0111\u00f3 nghe tr\u1ef1c ti\u1ebfp t\u1eeb c\u00e1i c\u00f2i.<\/p>\n

b) T\u1ea7n s\u1ed1 c\u1ee7a \u00e2m ng\u01b0\u1eddi \u0111\u00f3 nghe \u0111\u01b0\u1ee3c khi \u00e2m ph\u1ea3n x\u1ea1 l\u1ea1i t\u1eeb v\u00e1ch \u0111\u00e1.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

a) Ngu\u1ed3n \u00e2m \u0111i ra xa ng\u01b0\u1eddi nghe, v\u1eady t\u1ea7n s\u1ed1 \u00e2m nghe \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c:<\/p>\n

$\"\"$ <\/p>\n

Khi ra xa :<\/p>\n

$\"\"$ <\/p>\n

b) \u00c2m ph\u1ea3n x\u1ea1 t\u1eeb v\u00e1ch \u0111\u00e1 ti\u1ebfn l\u1ea1i g\u1ea7n ng\u01b0\u1eddi quan s\u00e1t n\u00ean c\u00f3 t\u1ea7n s\u1ed1 l\u00e0:<\/p>\n

$\"\"$ <\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U H\u1eceI C\u00e2u 1 (trang 101 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Gi\u1ea3i th\u00edch v\u00ec sao khi m\u00e1y thu chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n ngu\u1ed3n \u00e2m th\u00ec \u00e2m ghi nh\u1eadn \u0111\u01b0\u1ee3c l\u1ea1i c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn h\u01a1n \u00e2m ph\u00e1t ra? L\u1eddi gi\u1ea3i: Trong m\u1ed9t th\u1eddi gian t m\u1ed9t \u0111\u1ecbnh s\u00f3ng l\u1ea1i g\u1ea7n ng\u01b0\u1eddi quan s\u00e1t m\u1ed9t \u0111o\u1ea1n […]<\/p>\n","protected":false},"author":3,"featured_media":25152,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1304],"tags":[1434,1433],"yoast_head":"\nCh\u01b0\u01a1ng 3 -B\u00e0i 18: Hi\u1ec7u \u1ee9ng \u0110\u1ed1p-ple<\/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-3-bai-18-hieu-ung-dop-ple\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 3 -B\u00e0i 18: Hi\u1ec7u \u1ee9ng \u0110\u1ed1p-ple\" \/>\n<meta property=\"og:description\" content=\"C\u00c2U H\u1eceI C\u00e2u 1 (trang 101 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Gi\u1ea3i th\u00edch v\u00ec sao khi m\u00e1y thu chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n ngu\u1ed3n \u00e2m th\u00ec \u00e2m ghi nh\u1eadn \u0111\u01b0\u1ee3c l\u1ea1i c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn h\u01a1n \u00e2m ph\u00e1t ra? 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