Ch\u01b0\u01a1ng 2 - B\u00e0i 10: \u0110\u1eb7c tr\u01b0ng v\u1eadt l\u00ed c\u1ee7a \u00e2m<\/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-2-bai-10-dac-trung-vat-li-cua-am\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 2 - B\u00e0i 10: \u0110\u1eb7c tr\u01b0ng v\u1eadt l\u00ed c\u1ee7a \u00e2m\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 55 SGK V\u1eadt L\u00fd 12):\u00a0H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t kh\u00f4ng? L\u1eddi gi\u1ea3i: H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t l\u00e0 s\u00f3ng c\u01a1 h\u1ecdc, ch\u1ec9 kh\u00e1c nhau v\u1ec1 t\u1ea7n s\u1ed1. B\u00e0i 2 (trang 55 SGK V\u1eadt L\u00fd 12):\u00a0S\u00f3ng \u00e2m l\u00e0 g\u00ec? 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L\u1eddi gi\u1ea3i: H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t l\u00e0 s\u00f3ng c\u01a1 h\u1ecdc, ch\u1ec9 kh\u00e1c nhau v\u1ec1 t\u1ea7n s\u1ed1. B\u00e0i 2 (trang 55 SGK V\u1eadt L\u00fd 12):\u00a0S\u00f3ng \u00e2m l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: S\u00f3ng \u00e2m l\u00e0 s\u00f3ng […]","og_url":"https:\/\/lop12.edu.vn\/chuong-2-bai-10-dac-trung-vat-li-cua-am\/","og_site_name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam","article_published_time":"2018-03-30T10:49:35+00:00","og_image":[{"width":203,"height":50,"url":"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-617.png","type":"image\/png"}],"author":"H\u00e0 Trang","twitter_card":"summary_large_image","twitter_misc":{"Written by":"H\u00e0 Trang","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/chuong-2-bai-10-dac-trung-vat-li-cua-am\/","url":"https:\/\/lop12.edu.vn\/chuong-2-bai-10-dac-trung-vat-li-cua-am\/","name":"Ch\u01b0\u01a1ng 2 - B\u00e0i 10: \u0110\u1eb7c tr\u01b0ng v\u1eadt l\u00ed c\u1ee7a \u00e2m","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2018-03-30T10:49:35+00:00","dateModified":"2018-03-30T10:49:35+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/chuong-2-bai-10-dac-trung-vat-li-cua-am\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/chuong-2-bai-10-dac-trung-vat-li-cua-am\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/chuong-2-bai-10-dac-trung-vat-li-cua-am\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"Ch\u01b0\u01a1ng 2 – B\u00e0i 10: \u0110\u1eb7c tr\u01b0ng v\u1eadt l\u00ed c\u1ee7a \u00e2m"}]},{"@type":"WebSite","@id":"https:\/\/lop12.edu.vn\/#website","url":"https:\/\/lop12.edu.vn\/","name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/lop12.edu.vn\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45","name":"H\u00e0 Trang","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","caption":"H\u00e0 Trang"},"url":"https:\/\/lop12.edu.vn\/author\/trangvth2\/"}]}},"_links":{"self":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24835"}],"collection":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/comments?post=24835"}],"version-history":[{"count":1,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24835\/revisions"}],"predecessor-version":[{"id":24841,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24835\/revisions\/24841"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media\/24836"}],"wp:attachment":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media?parent=24835"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/categories?post=24835"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/tags?post=24835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":24835,"date":"2018-03-30T17:49:35","date_gmt":"2018-03-30T10:49:35","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=24835"},"modified":"2018-03-30T17:49:35","modified_gmt":"2018-03-30T10:49:35","slug":"chuong-2-bai-10-dac-trung-vat-li-cua-am","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-2-bai-10-dac-trung-vat-li-cua-am\/","title":{"rendered":"Ch\u01b0\u01a1ng 2 – B\u00e0i 10: \u0110\u1eb7c tr\u01b0ng v\u1eadt l\u00ed c\u1ee7a \u00e2m"},"content":{"rendered":"

B\u00e0i 1 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t kh\u00f4ng?<\/span><\/p>\n

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

H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t l\u00e0 s\u00f3ng c\u01a1 h\u1ecdc, ch\u1ec9 kh\u00e1c nhau v\u1ec1 t\u1ea7n s\u1ed1.<\/span><\/p>\n

B\u00e0i 2 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0S\u00f3ng \u00e2m l\u00e0 g\u00ec?<\/span><\/p>\n

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

S\u00f3ng \u00e2m l\u00e0 s\u00f3ng c\u01a1 h\u1ecdc lan truy\u1ec1n trong m\u00f4i tr\u01b0\u1eddng r\u1eafn, l\u1ecfng, kh\u00ed.<\/p>\n

B\u00e0i 3 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Nh\u1ea1c \u00e2m l\u00e0 g\u00ec?<\/span><\/p>\n

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

Nh\u1ea1c \u00e2m l\u00e0 \u00e2m c\u00f3 t\u1ea7n s\u1ed1 x\u00e1c \u0111\u1ecbnh.<\/p>\n

B\u00e0i 4 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Trong ba m\u00f4i tr\u01b0\u1eddng r\u1eafn, l\u1ecfng v\u00e0 kh\u00ed, \u00e2m truy\u1ec1n nhanh nh\u1ea5t trong m\u00f4i tr\u01b0\u1eddng n\u00e0o, ch\u1eadm nh\u1ea5t trong m\u00f4i tr\u01b0\u1eddng n\u00e0o ?<\/span><\/p>\n

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

Trong ba m\u00f4i tr\u01b0\u1eddng : R\u1eafn, l\u1ecfng, kh\u00ed th\u00ec \u00e2m truy\u1ec1n trong ch\u1ea5t r\u1eafn l\u00e0 nhanh nh\u1ea5t v\u00e0 ch\u1eadm nh\u1ea5t l\u00e0 \u00e2m truy\u1ec1n trong kh\u00f4ng kh\u00ed.<\/p>\n

B\u00e0i 5 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0C\u01b0\u1eddng \u0111\u1ed9 \u00e2m \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng g\u00ec ?<\/span><\/p>\n

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

C\u01b0\u1eddng \u0111\u1ed9 \u00e2m \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng o\u00e1t tr\u00ean m\u00e9t vu\u00f4ng, k\u00ed hi\u1ec7u l\u00e0 W\/m^{2<\/sup>.<\/p>\n}

B\u00e0i 6 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\n

Si\u00eau \u00e2m l\u00e0 \u00e2m<\/p>\n

A. c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn<\/p>\n

B. c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t l\u1edbn<\/p>\n

C. c\u00f3 t\u1ea7n s\u1ed1 tr\u00ean 20000Hz<\/p>\n

D. truy\u1ec1n trong m\u1ecdi m\u00f4i tr\u01b0\u1eddng nhanh h\u01a1n \u00e2m<\/p>\n

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

Ch\u1ecdn \u0111\u00e1p \u00e1n C<\/p>\n

B\u00e0i 7 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\n

C\u01b0\u1eddng \u0111\u1ed9 \u00e2m \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng<\/p>\n

A. o\u00e1t tr\u00ean m\u00e9t vu\u00f4ng.<\/p>\n

B. o\u00e1t<\/p>\n

C. niuton tr\u00ean m\u00e9t vu\u00f4ng<\/p>\n

D. niuton tr\u00ean m\u00e9t<\/p>\n

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

Ch\u1ecdn \u0111\u00e1p \u00e1n A.<\/p>\n

B\u00e0i 8 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0M\u1ed9t l\u00e1 th\u00e9p dao \u0111\u1ed9ng v\u1edbi chu k\u00ec T = 80ms. \u00c2m do n\u00f3 ph\u00e1t ra c\u00f3 nghe \u0111\u01b0\u1ee3c kh\u00f4ng ?<\/span><\/p>\n

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

Ta c\u00f3 :<\/p>\n

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

\u21d2 f = 12,5Hz < 16Hz.<\/p>\n

\u0110\u00e2y l\u00e0 s\u00f3ng h\u1ea1 \u00e2m n\u00ean tai ta kh\u00f4ng nghe \u0111\u01b0\u1ee3c.<\/p>\n

B\u00e0i 9 (trang 55 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0M\u1ed9t si\u00eau \u00e2m c\u00f3 t\u1ea7n s\u1ed1 1MHz. S\u1eed d\u1ee5ng b\u1ea3ng 10.1 SGK, h\u00e3y t\u00ednh b\u01b0\u1edbc s\u00f3ng c\u1ee7a si\u00eau \u00e2m n\u00e0y trong kh\u00f4ng kh\u00ed \u1edf 0^{o<\/sup>C v\u00e0 trong n\u01b0\u1edbc \u1edf 15^{o<\/sup>C.<\/span><\/p>\n}}

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

Theo b\u1ea3ng 10.1, v\u1eadn t\u1ed1c \u00e2m trong kh\u00f4ng kh\u00ed \u1edf 0^{o<\/sup>C l\u00e0 v = 331 m\/s, trong n\u01b0\u1edbc \u1edf 15^{o<\/sup>C v’ = 1500(m\/s)<\/p>\n}}

B\u01b0\u1edbc s\u00f3ng c\u1ee7a si\u00eau \u00e2m trong kh\u00f4ng kh\u00ed \u1edf 0^{o<\/sup>C<\/p>\n}

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

B\u01b0\u1edbc s\u00f3ng c\u1ee7a \u00e2m trong n\u01b0\u1edbc \u1edf 15^{o<\/sup>C<\/p>\n}

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

B\u00e0i 10 (trang 5 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0\u0110\u1ec3 \u0111o t\u1ed1c \u0111\u1ed9 \u00e2m trong gang, nh\u00e0 v\u1eadt l\u00ed Ph\u00e1p Bi-\u00f4 \u0111\u00e3 d\u00f9ng m\u1ed9t \u1ed1ng b\u1eb1ng gang d\u00e0i 951,25m. M\u1ed9t ng\u01b0\u1eddi \u0111\u1eadp m\u1ed9t nh\u00e1t b\u00faa v\u00e0o m\u1ed9t \u0111\u1ea7u \u1ed1ng gang, m\u1ed9t ng\u01b0\u1eddi \u1edf \u0111\u1ea7u kia nghe th\u1ea5y hai ti\u1ebfng g\u00f5, m\u1ed9t truy\u1ec1n qua gang v\u00e0 m\u1ed9t truy\u1ec1n qua kh\u00f4ng kh\u00ed \u1edf trong \u1ed1ng gang ; hai ti\u1ebfng \u1ea5y c\u00e1ch nhau 2,5s. Bi\u1ebft t\u1ed1c \u0111\u1ed9 \u00e2m trong kh\u00f4ng kh\u00ed l\u00e0 340m\/s, h\u00e3y t\u00ednh t\u1ed1c \u0111\u1ed9 \u00e2m trong gang.<\/span><\/p>\n

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

V\u1eadn t\u1ed1c \u00e2m truy\u1ec1n trong gang nhanh h\u01a1n v\u1eadn t\u1ed1c truy\u1ec1n trong kh\u00f4ng kh\u00ed<\/p>\n

G\u1ecdi t l\u00e0 th\u1eddi gian truy\u1ec1n \u00e2m trong kh\u00f4ng kh\u00ed.<\/p>\n

Th\u1eddi gian truy\u1ec1n trong gang l\u00e0 (t \u2013 2,5)<\/p>\n

Ta c\u00f3: Th\u1eddi gian truy\u1ec1n trong kh\u00f4ng kh\u00ed:<\/p>\n

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

T\u1ed1c \u0111\u1ed9 \u00e2m trong gang:<\/p>\n

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

B\u00e0i 1 (trang 55 SGK V\u1eadt L\u00fd 12):\u00a0H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t kh\u00f4ng? L\u1eddi gi\u1ea3i: H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t l\u00e0 s\u00f3ng c\u01a1 h\u1ecdc, ch\u1ec9 kh\u00e1c nhau v\u1ec1 t\u1ea7n s\u1ed1. B\u00e0i 2 (trang 55 SGK V\u1eadt L\u00fd 12):\u00a0S\u00f3ng \u00e2m l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: S\u00f3ng \u00e2m l\u00e0 s\u00f3ng […]<\/p>\n","protected":false},"author":3,"featured_media":24836,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1303],"tags":[1428,1427],"yoast_head":"\nCh\u01b0\u01a1ng 2 - B\u00e0i 10: \u0110\u1eb7c tr\u01b0ng v\u1eadt l\u00ed c\u1ee7a \u00e2m<\/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-2-bai-10-dac-trung-vat-li-cua-am\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 2 - B\u00e0i 10: \u0110\u1eb7c tr\u01b0ng v\u1eadt l\u00ed c\u1ee7a \u00e2m\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 55 SGK V\u1eadt L\u00fd 12):\u00a0H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m c\u00f3 c\u00f9ng b\u1ea3n ch\u1ea5t kh\u00f4ng? 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