B\u00e0i 1: Chuy\u1ec3n \u0111\u1ed9ng c\u01a1<\/h2>\n\n\n\n

C1.<\/strong> ( trang 8 sgk V\u1eadt L\u00fd 10) Cho bi\u1ebft (m\u1ed9t c\u00e1ch g\u1ea7n \u0111\u00fang):<\/p>\n\n\n\n

–\t\u0110\u01b0\u1eddng k\u00ednh c\u1ee7a M\u1eb7t Tr\u1eddi : 1 400 000 km.<\/p>\n\n\n\n

–\t\u0110\u01b0\u1eddng k\u00ednh c\u1ee7a Tr\u00e1i \u0110\u1ea5t : 12 000 km.<\/ins><\/p>\n\n\n\n

–\tKho\u1ea3ng c\u00e1ch t\u1eeb Tr\u00e1i \u0110\u1ea5t \u0111\u1ebfn M\u1eb7t Tr\u1eddi : 150 000 000 km.<\/p>\n\n\n\n

a)\tN\u1ebfu v\u1ebd \u0111\u01b0\u1eddng \u0111i c\u1ee7a Tr\u00e1i \u0110\u1ea5t quanh M\u1eb7t Tr\u1eddi l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng tr\u00f2n, \n\u0111\u01b0\u1eddng k\u00ednh 15 cm th\u00ec h\u00ecnh v\u1ebd Tr\u00e1i \u0110\u1ea5t v\u00e0 M\u1eb7t Tr\u1eddi s\u1ebd l\u00e0 nh\u1eefng \u0111\u01b0\u1eddng tr\u00f2n\n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh bao nhi\u00eau xentimet?<\/p>\n\n\n\n

b)\tC\u00f3 th\u1ec3 coi Tr\u00e1i \u0110\u1ea5t nh\u01b0 m\u1ed9t ch\u1ea5t \u0111i\u1ec3m trong h\u1ec7 M\u1eb7t Tr\u1eddi \u0111\u01b0\u1ee3c kh\u00f4ng ?<\/p>\n\n\n\n

Tr\u1ea3 l\u1eddi:<\/strong><\/p>\n\n\n\n

a) Kho\u1ea3ng c\u00e1ch t\u1eeb Tr\u00e1i \u0110\u1ea5t \u0111\u1ebfn M\u1eb7t Tr\u1eddi: 150.000.000 km = 150.10^{11<\/sup> cm v\u1ebd th\u00e0nh 15\/2 = 7,5 cm.<\/ins><\/p>\n\n\n\n}

–\tV\u1ebd 1 cm \u1ee9ng v\u1edbi kho\u1ea3ng c\u00e1ch th\u1eadt l\u00e0 : <\/p>\n\n\n\n

<\/figure>\n\n\n\n

H\u00ecnh v\u1ebd Tr\u00e1i \u0110\u1ea5t s\u1ebd ph\u1ea3i l\u00e0 \u0111\u01b0\u1eddng tr\u00f2n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh :<\/p>\n\n\n\n

<\/figure>\n\n\n\n

M\u1eb7t Tr\u1eddi s\u1ebd ph\u1ea3i v\u1ebd l\u00e0 \u0111\u01b0\u1eddng tr\u00f2n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh :<\/p>\n\n\n\n

<\/figure>\n\n\n\n

b) Chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u01b0\u1eddng \u0111i tr\u00ean h\u00ecnh v\u1ebd l\u00e0 : \n <\/p>\n\n\n\n

<\/figure>\n\n\n\n

\u2192 Chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng \u0111i g\u1ea5p 47,1 \/ 0,0006 = 78500 l\u1ea7n k\u00edch th\u01b0\u1edbc c\u1ee7a Tr\u00e1i \u0110\u1ea5t, r\u1ea5t nh\u1ecf so v\u1edbi \u0111\u01b0\u1eddng \u0111i.\n<\/p>\n\n\n\n

\u2192 C\u00f3 th\u1ec3 coi Tr\u00e1i \u0110\u1ea5t nh\u01b0 m\u1ed9t ch\u1ea5t \u0111i\u1ec3m trong h\u1ec7 M\u1eb7t Tr\u1eddi.\n<\/ins><\/p>\n\n\n\n

C2.<\/strong>( trang 9 sgk V\u1eadt L\u00fd 10) C\u00f3 th\u1ec3 l\u1ea5y v\u1eadt n\u00e0o l\u00e0m m\u1ed1c \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed m\u1ed9t chi\u1ebfc t\u00e0u th\u1ee7y \u0111ang ch\u1ea1y tr\u00ean s\u00f4ng?<\/p>\n\n\n\n

Tr\u1ea3 l\u1eddi:<\/strong><\/p>\n\n\n\n

V\u1eadt l\u00e0m m\u1ed1c l\u00e0 m\u1ed9t v\u1eadt b\u1ea5t k\u00ec, \u0111\u1ee9ng y\u00ean tr\u00ean b\u1edd s\u00f4ng ho\u1eb7c d\u01b0\u1edbi s\u00f4ng nh\u01b0: c\u00e2y b\u00ean b\u1edd s\u00f4ng, b\u1ebfn \u0111\u00f2, m\u1ed9t c\u00e2y c\u1ea7u\u2026.\n <\/p>\n\n\n\n

C3.<\/strong>( trang 9 sgk V\u1eadt L\u00fd 10) H\u00e3y cho \nbi\u1ebft c\u00e1c t\u1ecda \u0111\u1ed9 c\u1ee7a \u0111i\u1ec3m M n\u1eb1m ch\u00ednh gi\u1eefa m\u1ed9t b\u1ee9c t\u01b0\u1eddng h\u00ecnh ch\u1eef nh\u1eadt \nABCD c\u00f3 c\u1ea1nh AB = 5 m, v\u00e0 c\u1ea1nh AD = 4 m (H\u00ecnh 1.4). L\u1ea5y tr\u1ee5c Ox d\u1ecdc theo\n AB, tr\u1ee5c Oy d\u1ecdc theo AD.<\/p>\n\n\n\n

Tr\u1ea3 l\u1eddi:<\/strong><\/p>\n\n\n\n

T\u1ecda \u0111\u1ed9 \u0111i\u1ec3m M l\u00e0 : <\/p>\n\n\n\n

<\/figure>\n\n\n\n

C4.<\/strong>( trang 10 sgk V\u1eadt L\u00fd 10) Cho b\u1ea3ng g\u1eddi t\u00e0u (b\u1ea3ng 1.1), H\u00e3y t\u00ednh xem \u0111o\u00e0n t\u00e0u ch\u1ea1y t\u1eeb ga H\u00e0 N\u1ed9i \u0111\u1ebfn ga S\u00e0i G\u00f2n trong bao l\u00e2u? <\/p>\n\n\n\n

B\u1ea3ng gi\u1edd t\u00e0u <\/strong><\/td><\/tr>
\nH\u00e0 N\u1ed9i \nNam \u0110\u1ecbnh\nThanh H\u00f3a \nVinh \n\u0110\u1ed3ng H\u1edbi \n\u0110\u00f4ng H\u00e0 \nHu\u1ebf \n\u0110\u00e0 N\u1eb5ng \n\n <\/td>	\n19h 00′ \n20h 56′\n22h 31′\n0h 53′\n4h 42′ \n6h 44′\n8h 05′\n10h 54′\n\n\n <\/td>	\nTam K\u1ef3 \nQu\u1ea3ng Ng\u00e3i \nDi\u00eau Tr\u00ec \nTuy H\u00f2a \nNha Trang \nTh\u00e1p Ch\u00e0m \nS\u00e0i G\u00f2n \n <\/td>	\n12h 26′\n13h 37′\n16h 31′\n18h 25′\n20h 26′\n22h 26′\n4h 00′ \n <\/td><\/tr><\/tbody><\/table>\n\n\n\n Tr\u1ea3 l\u1eddi:<\/strong><\/p>\n\n\n\n Ch\u1ecdn m\u1ed1c th\u1eddi gian l\u00fac 19 gi\u1edd 00 ph\u00fat ng\u00e0y th\u1ee9 nh\u1ea5t t\u1ea1i H\u00e0 N\u1ed9i.\n<\/p>\n\n\n\n Quan s\u00e1t b\u1ea3ng gi\u1edd t\u00e0u ta th\u1ea5y \u0111\u1ebfn 19 gi\u1edd 00 ph\u00fat ng\u00e0y th\u1ee9 hai (sau \nkhi su\u1ea5t ph\u00e1t \u0111\u01b0\u1ee3c 1 ng\u00e0y) th\u00ec t\u00e0u \u0111\u00e3 qua ga Tuy H\u00f2a m\u1ed9t \u0111o\u1ea1n. Ti\u1ebfp t\u1ee5c \nt\u00e0u ch\u1ea1y \u0111\u1ebfn 24 gi\u1edd 00 ph\u00fat c\u00f9ng ng\u00e0y (ch\u1ea1y th\u00eam 5 gi\u1edd n\u1eefa) th\u00ec ch\u01b0a \u0111\u1ebfn\n ga S\u00e0i G\u00f2n, sau \u0111\u00f3 t\u00e0u ch\u1ea1y th\u00eam 4 gi\u1edd n\u1eefa sang ng\u00e0y h\u00f4m sau th\u00ec \u0111\u1ebfn \nS\u00e0i G\u00f2n.\n<\/ins><\/p>\n\n\n\n V\u1eady t\u1ed5ng th\u1eddi gian t\u00e0u ch\u1ea1y t\u1eeb ga H\u00e0 N\u1ed9i v\u00e0o ga S\u00e0i G\u00f2n l\u00e0:\n<\/p>\n\n\n\n 1 ng\u00e0y + 5 gi\u1edd + 4 gi\u1edd = 33 gi\u1edd\n<\/p>\n","protected":false},"excerpt":{"rendered":" B\u00e0i 1: Chuy\u1ec3n \u0111\u1ed9ng c\u01a1 C1. ( trang 8 sgk V\u1eadt L\u00fd 10) Cho bi\u1ebft (m\u1ed9t c\u00e1ch g\u1ea7n \u0111\u00fang): – \u0110\u01b0\u1eddng k\u00ednh c\u1ee7a M\u1eb7t Tr\u1eddi : 1 400 000 km. – \u0110\u01b0\u1eddng k\u00ednh c\u1ee7a Tr\u00e1i \u0110\u1ea5t : 12 000 km. – Kho\u1ea3ng c\u00e1ch t\u1eeb Tr\u00e1i \u0110\u1ea5t \u0111\u1ebfn M\u1eb7t Tr\u1eddi : 150 000 000 km. a) […]<\/p>\n","protected":false},"author":12,"featured_media":44091,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1640],"tags":[],"yoast_head":"\n