{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"H\u00e3y ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t: ","select":["A. Trong qu\u00e1 tr\u00ecnh c\u01a1 h\u1ecdc, \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n ho\u00e1 l\u1eabn nhau, nh\u01b0ng c\u01a1 n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.","B. N\u1ebfu khi m\u1ed9t v\u1eadt chuy\u1ec3n \u0111\u1ed9ng, \u1edf v\u1ecb tr\u00ed n\u00e0o v\u1eadt c\u00f3 \u0111\u1ed9ng n\u0103ng l\u1edbn nh\u1ea5t th\u00ec \u1edf v\u1ecb tr\u00ed \u0111\u00f3 th\u1ebf n\u0103ng c\u1ee7a n\u00f3 s\u1ebd nh\u1ecf nh\u1ea5t.","C. C\u1ea3 hai \u0111\u00e1p \u00e1n A,B \u0111\u1ec1u \u0111\u00fang.","D. C\u1ea3 hai \u0111\u00e1p \u00e1n A,B \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>Trong qu\u00e1 tr\u00ecnh c\u01a1 h\u1ecdc, \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n ho\u00e1 l\u1eabn nhau, nh\u01b0ng c\u01a1 n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.<br\/>N\u1ebfu khi m\u1ed9t v\u1eadt chuy\u1ec3n \u0111\u1ed9ng, \u1edf v\u1ecb tr\u00ed n\u00e0o v\u1eadt c\u00f3 \u0111\u1ed9ng n\u0103ng l\u1edbn nh\u1ea5t th\u00ec \u1edf v\u1ecb tr\u00ed \u0111\u00f3 th\u1ebf n\u0103ng c\u1ee7a n\u00f3 s\u1ebd nh\u1ecf nh\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2760},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Trong qu\u00e1 tr\u00ecnh c\u01a1 h\u1ecdc, \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n ho\u00e1 l\u1eabn nhau, nh\u01b0ng c\u01a1 n\u0103ng th\u00ec ..., ng\u01b0\u1eddi ta n\u00f3i c\u01a1 n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.","select":["A. T\u0103ng l\u00ean.","B. Kh\u00f4ng \u0111\u1ed5i.","C. Gi\u1ea3m \u0111i.","D. C\u00f3 th\u1ec3 t\u0103ng ho\u1eb7c gi\u1ea3m."],"hint":"","explain":"<span class='basic_left'>Trong qu\u00e1 tr\u00ecnh c\u01a1 h\u1ecdc, \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n ho\u00e1 l\u1eabn nhau, nh\u01b0ng c\u01a1 n\u0103ng th\u00ec kh\u00f4ng \u0111\u1ed5i, ng\u01b0\u1eddi ta n\u00f3i c\u01a1 n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2761},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Khi b\u1eafn cung th\u00ec n\u0103ng l\u01b0\u1ee3ng n\u00e0o chuy\u1ec3n ho\u00e1 th\u00e0nh n\u0103ng l\u01b0\u1ee3ng n\u00e0o?","select":["A. \u0110\u1ed9ng n\u0103ng chuy\u1ec3n h\u00f3a th\u00e0nh th\u1ebf n\u0103ng.","B. Th\u1ebf n\u0103ng chuy\u1ec3n h\u00f3a th\u00e0nh \u0111\u1ed9ng n\u0103ng.","C. Th\u1ebf n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.","D. \u0110\u1ed9ng n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n."],"hint":"","explain":"<span class='basic_left'>Khi b\u1eafn cung th\u00ec th\u1ebf n\u0103ng c\u1ee7a c\u00e1nh cung chuy\u1ec3n h\u00f3a th\u00e0nh \u0111\u1ed9ng n\u0103ng c\u1ee7a m\u0169i t\u00ean. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2762},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Khi n\u01b0\u1edbc t\u1eeb tr\u00ean \u0111\u1eadp cao ch\u1ea3y xu\u1ed1ng th\u00ec n\u0103ng l\u01b0\u1ee3ng n\u00e0o chuy\u1ec3n ho\u00e1 th\u00e0nh n\u0103ng l\u01b0\u1ee3ng n\u00e0o?","select":["A. Th\u1ebf n\u0103ng chuy\u1ec3n ho\u00e1 th\u00e0nh \u0111\u1ed9ng n\u0103ng.","B. \u0110\u1ed9ng n\u0103ng chuy\u1ec3n ho\u00e1 th\u00e0nh th\u1ebf n\u0103ng.","C. Kh\u00f4ng c\u00f3 s\u1ef1 chuy\u1ec3n h\u00f3a n\u0103ng l\u01b0\u1ee3ng.","D. C\u1ea3 2 \u0111\u00e1p \u00e1n \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>Khi n\u01b0\u1edbc t\u1eeb tr\u00ean \u0111\u1eadp cao ch\u1ea3y xu\u1ed1ng th\u00ec th\u1ebf n\u0103ng c\u1ee7a n\u01b0\u1edbc chuy\u1ec3n ho\u00e1 th\u00e0nh \u0111\u1ed9ng n\u0103ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2763},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ch\u1ecdn ph\u00e1t bi\u1ec3u sai v\u1ec1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a con l\u1eafc:","select":["A. Trong chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a con l\u1eafc \u0111\u00e3 c\u00f3 s\u1ef1 chuy\u1ec3n h\u00f3a li\u00ean t\u1ee5c c\u00e1c d\u1ea1ng c\u01a1 n\u0103ng: Th\u1ebf n\u0103ng chuy\u1ec3n ho\u00e1 th\u00e0nh \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9ng n\u0103ng chuy\u1ec3n ho\u00e1 th\u00e0nh th\u1ebf n\u0103ng.","B. Khi con l\u1eafc \u1edf v\u1ecb tr\u00ed th\u1ea5p nh\u1ea5t (v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng), th\u1ebf n\u0103ng \u0111\u00e3 chuy\u1ec3n ho\u00e1 ho\u00e0n to\u00e0n th\u00e0nh \u0111\u1ed9ng n\u0103ng.","C. Khi con l\u1eafc \u1edf v\u1ecb tr\u00ed cao nh\u1ea5t, th\u1ebf n\u0103ng \u0111\u00e3 chuy\u1ec3n ho\u00e1 ho\u00e0n to\u00e0n th\u00e0nh \u0111\u1ed9ng n\u0103ng.","D. Khi con l\u1eafc \u1edf v\u1ecb tr\u00ed cao nh\u1ea5t, \u0111\u1ed9ng n\u0103ng \u0111\u00e3 chuy\u1ec3n ho\u00e1 ho\u00e0n to\u00e0n th\u00e0nh th\u1ebf n\u0103ng."],"hint":"","explain":"<span class='basic_left'>Khi con l\u1eafc \u1edf v\u1ecb tr\u00ed th\u1ea5p nh\u1ea5t (v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng), th\u1ebf n\u0103ng \u0111\u00e3 chuy\u1ec3n ho\u00e1 ho\u00e0n to\u00e0n th\u00e0nh \u0111\u1ed9ng n\u0103ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2764},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"\u0110\u01b0a m\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng m l\u00ean \u0111\u1ed9 cao 20m. \u1ede \u0111\u1ed9 cao n\u00e0y v\u1eadt c\u00f3 th\u1ebf n\u0103ng 600J. X\u00e1c \u0111\u1ecbnh tr\u1ecdng l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt? ","select":["A. 50N.","B. 40N.","C. 30N.","D. 20N."],"hint":"","explain":"<span class='basic_left'>Tr\u1ecdng l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt:<br\/>$P=\\dfrac{A}{h}=\\dfrac{600}{20}=30N$<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2765},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"\u0110\u01b0a m\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng m l\u00ean \u0111\u1ed9 cao 20m. \u1ede \u0111\u1ed9 cao n\u00e0y v\u1eadt c\u00f3 th\u1ebf n\u0103ng 600J, v\u1eadt r\u01a1i v\u1edbi v\u1eadn t\u1ed1c ban \u0111\u1ea7u b\u1eb1ng kh\u00f4ng. B\u1ecf qua s\u1ee9c c\u1ea3n kh\u00f4ng kh\u00ed. H\u1ecfi khi r\u01a1i t\u1edbi \u0111\u1ed9 cao b\u1eb1ng 5m, \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt c\u00f3 gi\u00e1 tr\u1ecb b\u1eb1ng bao nhi\u00eau?","select":["A. 200J.","B. 300J.","C. 150J.","D. 450J."],"hint":"","explain":"<span class='basic_left'>Th\u1ebf n\u0103ng t\u1ea1i \u0111\u1ed9 cao 5m l\u00e0 150J.<br\/> => \u0110\u1ed9ng n\u0103ng t\u1ea1i \u0111\u1ed9 cao 5m l\u00e0 450J. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2766},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Tr\u01b0\u1eddng h\u1ee3p n\u00e0o sau \u0111\u00e2y kh\u00f4ng c\u00f3 s\u1ef1 b\u1ea3o to\u00e0n c\u01a1 n\u0103ng c\u1ee7a v\u1eadt? ","select":["A. M\u1ed9t v\u1eadt n\u1eb7ng r\u01a1i t\u1eeb tr\u00ean cao xu\u1ed1ng d\u01b0\u1edbi.","B. Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a M\u1eb7t Tr\u0103ng quanh Tr\u00e1i \u0110\u1ea5t.","C. Vi\u00ean bi chuy\u1ec3n \u0111\u1ed9ng tr\u00ean m\u1eb7t ph\u0103ng nh\u1eb5n.","D. M\u1ed9t con b\u00f2 \u0111ang k\u00e9o xe."],"hint":"","explain":"<span class='basic_left'>M\u1ed9t con b\u00f2 \u0111ang k\u00e9o xe l\u00e0 s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng kh\u00f4ng c\u00f3 b\u1ea3o t\u00e0n c\u01a1 n\u0103ng do ma s\u00e1t c\u1ee7a \u0111\u01b0\u1eddng l\u00ean xe l\u00e0m gi\u1ea3m c\u01a1 n\u0103ng c\u1ee7a h\u1ec7 v\u00e0 con b\u00f2 li\u00ean t\u1ee5c d\u00f9ng l\u1ef1c k\u00e9p \u0111\u1ec3 duy tr\u00ec chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a xe. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2767},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Ng\u01b0\u1eddi ta n\u00e9m m\u1ed9t v\u1eadt theo ph\u01b0\u01a1ng n\u1eb1m ngang t\u1eeb m\u1ed9t \u0111\u1ed9 cao n\u00e0o \u0111\u00f3 c\u00e1ch m\u1eb7t \u0111\u1ea5t. Th\u1ebf n\u0103ng v\u00e0 \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt thay \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o t\u1eeb l\u00fac n\u00e9m \u0111\u1ebfn l\u00fac v\u1eadt ch\u1ea1m \u0111\u1ea5t? ","select":["A. Th\u1ebf n\u0103ng t\u0103ng d\u1ea7n, \u0111\u1ed9ng n\u0103ng gi\u1ea3m d\u1ea7n.","B. Th\u1ebf n\u0103ng gi\u1ea3m d\u1ea7n, \u0111\u1ed9ng n\u0103ng t\u0103ng d\u1ea7n.","C. Th\u1ebf n\u0103ng kh\u00f4ng \u0111\u1ed5i, \u0111\u1ed9ng n\u0103ng t\u0103ng d\u1ea7n.","D. Th\u1ebf n\u0103ng gi\u1ea3m d\u1ea7n, \u0111\u1ed9ng n\u0103ng kh\u00f4ng \u0111\u1ed5i."],"hint":"","explain":"<span class='basic_left'>Khi v\u1eadt \u0111\u01b0\u1ee3c n\u00e9m t\u1eeb \u0111\u1ed9 cao n\u00e0o \u0111\u00f3, th\u1ebf n\u0103ng s\u1ebd huy\u1ec3n h\u00f3a th\u00e0nh \u0111\u1ed9ng n\u0103ng v\u00e0o do \u0111\u00f3 th\u1ebf n\u0103ng gi\u1ea3m c\u00f2n \u0111\u1ed9ng n\u0103ng t\u0103ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2768},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai17/lv2/img\/h10.jpg'\/><\/center>K\u00e9o con l\u1eafc l\u1ec7ch kh\u1ecfi v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng \u0111\u1ec3 qu\u1ea3 c\u1ea7u c\u1ee7a con l\u1eafc \u1edf v\u1ecb tr\u00ed A r\u1ed3i bu\u00f4ng tay cho con l\u1eafc dao \u0111\u1ed9ng (H.17.4). B\u1ecf qua ma s\u00e1t c\u1ee7a kh\u00f4ng kh\u00ed. Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang? ","select":["A. Con l\u1eafc chuy\u1ec3n \u0111\u1ed9ng t\u1eeb A v\u1ec1 \u0111\u1ebfn v\u1ecb tr\u00ed C \u0111\u1ed9ng n\u0103ng t\u0103ng d\u1ea7n, th\u1ebf n\u0103ng gi\u1ea3m d\u1ea7n.","B. Con l\u1eafc chuy\u1ec3n \u0111\u1ed9ng t\u1eeb C \u0111\u1ebfn B, th\u1ebf n\u0103ng t\u0103ng d\u1ea7n, \u0111\u1ed9ng n\u0103ng gi\u1ea3m d\u1ea7n.","C. C\u01a1 n\u0103ng c\u1ee7a con l\u1eafc \u1edf v\u1ecb tr\u00ed C nh\u1ecf h\u01a1n \u1edf v\u1ecb tr\u00ed A.","D. Th\u1ebf n\u0103ng c\u1ee7a con l\u1eafc \u1edf v\u1ecb tr\u00ed A b\u1eb1ng \u1edf v\u1ecb tr\u00ed B."],"hint":"","explain":"<span class='basic_left'>C\u01a1 n\u0103ng c\u1ee7a con l\u1eafc \u1edf m\u1ecdi v\u1ecb tr\u00ed l\u00e0 nh\u01b0 nhau. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2769},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai17/lv2/img\/h11.jpg'\/><\/center>M\u1ed9t con l\u1eafc \u0111ang dao \u0111\u1ed9ng t\u1eeb v\u1ecb tr\u00ed A sang v\u1ecb tr\u00ed C v\u00e0 ng\u01b0\u1ee3c l\u1ea1i (H.17.6). N\u1ebfu l\u1ea5y m\u1ed1c t\u00ednh \u0111\u1ed9 cao l\u00e0 m\u1eb7t \u0111\u1ea5t v\u00e0 b\u1ecf qua ma s\u00e1t v\u1edbi kh\u00f4ng kh\u00ed th\u00ec t\u1ea1i \u0111i\u1ec3m A v\u00e0 \u0111i\u1ec3m C, con l\u1eafc s\u1ebd:","select":["A. C\u00f3 c\u01a1 n\u0103ng b\u1eb1ng kh\u00f4ng.","B. Ch\u1ec9 c\u00f3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","C. Ch\u1ec9 c\u00f3 \u0111\u1ed9ng n\u0103ng.","D. C\u00f3 c\u1ea3 \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn."],"hint":"","explain":"<span class='basic_left'>V\u00ec t\u1ea1i v\u1ecb tr\u00ed \u0111\u00f3 con l\u1eafc c\u00f3 \u0111\u1ed9 cao l\u1edbn nh\u1ea5t, v\u1eadn t\u1ed1c c\u1ee7a n\u00f3 b\u1eb1ng kh\u00f4ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2770},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Khi n\u00e9m m\u1ed9t v\u1eadt l\u00ean theo ph\u01b0\u01a1ng \u0111\u1ee9ng th\u1eb3ng \u0111\u00e3 c\u00f3 s\u1ef1 chuy\u1ec3n h\u00f3a d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng n\u00e0o ?","select":["A. C\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1eeb \u0111\u1ed9ng n\u0103ng sang th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.","B. C\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1eeb \u0111\u1ed9ng n\u0103ng sang th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","C. C\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1eeb th\u1ebf n\u0103ng h\u1ea5p d\u1eabn sang \u0111\u1ed9ng n\u0103ng.","D. C\u00f3 s\u1ef1 th\u1ef1c hi\u1ec7n c\u00f4ng bi\u1ebfn \u0111\u1ed5i th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i."],"hint":"","explain":"<span class='basic_left'>Khi n\u00e9m m\u1ed9t v\u1eadt l\u00ean theo ph\u01b0\u01a1ng \u0111\u1ee9ng th\u1eb3ng c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1eeb \u0111\u1ed9ng n\u0103ng sang th\u1ebf n\u0103ng h\u1ea5p d\u1eabn, \u0111\u1ed9ng n\u0103ng gi\u1ea3m d\u1ea7n v\u00e0 th\u1ebf n\u0103ng th\u00ec t\u0103ng d\u1ea7n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2771},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Khi l\u00ean d\u00e2y c\u00f3t \u0111\u1ed3ng h\u1ed3 \u0111\u00e3 c\u00f3 s\u1ef1 chuy\u1ec3n h\u00f3a d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng n\u00e0o ?","select":["A. C\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1eeb th\u1ebf n\u0103ng h\u1ea5p d\u1eabn sang \u0111\u1ed9ng n\u0103ng.","B. C\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1eeb \u0111\u1ed9ng n\u0103ng sang th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","C. C\u00f3 s\u1ef1 th\u1ef1c hi\u1ec7n c\u00f4ng bi\u1ebfn \u0111\u1ed5i th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.","D. C\u00f3 s\u1ef1 th\u1ef1c hi\u1ec7n c\u00f4ng bi\u1ebfn \u0111\u1ed5i th\u1ebf n\u0103ng h\u1ea5p d\u1eabn."],"hint":"","explain":"<span class='basic_left'>Khi l\u00ean d\u00e2y c\u00f3t \u0111\u1ed3ng h\u1ed3 \u0111\u00e3 c\u00f3 s\u1ef1 th\u1ef1c hi\u1ec7n c\u00f4ng bi\u1ebfn \u0111\u1ed5i th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2772},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai17/lv2/img\/h14.jpg'\/><\/center>T\u1eeb \u0111i\u1ec3m A, m\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c n\u00e9m l\u00ean theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng. V\u1eadt l\u00ean \u0111\u1ebfn v\u1ecb tr\u00ed cao nh\u1ea5t B r\u1ed3i r\u01a1i xu\u1ed1ng \u0111\u1ebfn \u0111i\u1ec3m C tr\u00ean m\u1eb7t \u0111\u1ea5t. G\u1ecdi D l\u00e0 \u0111i\u1ec3m b\u1ea5t k\u00ec tr\u00ean \u0111o\u1ea1n AB (H.17.3). Ph\u00e1t bi\u1ec3u n\u00e0o d\u01b0\u1edbi \u0111\u00e2y \u0111\u00fang? ","select":["A. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i A l\u1edbn nh\u1ea5t.","B. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i A b\u1eb1ng th\u1ebf n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i B.","C. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt \u1edf t\u1ea1i C l\u00e0 l\u1edbn nh\u1ea5t.","D. C\u01a1 n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i A nh\u1ecf h\u01a1n t\u1ea1i C."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u0111i\u1ec3m C l\u00e0 \u0111i\u1ec3m th\u1ea5p nh\u1ea5t n\u00ean th\u1ebf n\u0103ng nh\u1ecf nh\u1ea5t, \u0111\u1ed9ng n\u0103ng l\u1edbn nh\u1ea5t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2773},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t khi n\u00f3i v\u1ec1 v\u1ec1 s\u1ef1 chuy\u1ec3n h\u00f3a c\u01a1 n\u0103ng ? ","select":["A. \u0110\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n h\u00f3a qua l\u1ea1i l\u1eabn nhau, nh\u01b0ng c\u01a1 n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.","B. Th\u1ebf n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n h\u00f3a th\u00e0nh \u0111\u1ed9ng n\u0103ng.","C. \u0110\u1ed9ng n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n h\u00f3a th\u00e0nh th\u1ebf n\u0103ng. ","D. \u0110\u1ed9ng n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n h\u00f3a th\u00e0nh th\u1ebf n\u0103ng v\u00e0 ng\u01b0\u1ee3c l\u1ea1i."],"hint":"","explain":"<span class='basic_left'> \u0110\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n h\u00f3a qua l\u1ea1i l\u1eabn nhau, nh\u01b0ng c\u01a1 n\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2774},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Quan s\u00e1t tr\u01b0\u1eddng h\u1ee3p qu\u1ea3 b\u00f3ng r\u01a1i ch\u1ea1m \u0111\u1ea5t, n\u00f3 n\u1ea3y l\u00ean. Trong th\u1eddi gian n\u1ea3y l\u00ean th\u1ebf n\u0103ng v\u00e0 \u0111\u1ed9ng n\u0103ng c\u1ee7a n\u00f3 thay \u0111\u1ed5i th\u1ebf n\u00e0o ? ","select":["A. \u0110\u1ed9ng n\u0103ng t\u0103ng, th\u1ebf n\u0103ng gi\u1ea3m.","B. \u0110\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng \u0111\u1ec1u t\u0103ng.","C. \u0110\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng \u0111\u1ec1u gi\u1ea3m.","D. \u0110\u1ed9ng n\u0103ng gi\u1ea3m, th\u1ebf n\u0103ng t\u0103ng."],"hint":"","explain":"<span class='basic_left'>Trong th\u1eddi gian n\u1ea3y l\u00ean \u0111\u1ed9ng n\u0103ng gi\u1ea3m, th\u1ebf n\u0103ng t\u0103ng<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2775},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau, tr\u01b0\u1eddng h\u1ee3p n\u00e0o c\u00f3 s\u1ef1 chuy\u1ec3n h\u00f3a th\u1ebf n\u0103ng th\u00e0nh \u0111\u1ed9ng n\u0103ng ? ","select":["A. M\u0169i t\u00ean \u0111\u01b0\u1ee3c b\u1eafn \u0111i t\u1eeb cung.","B. N\u01b0\u1edbc tr\u00ean \u0111\u1eadp cao ch\u1ea3y xu\u1ed1ng.","C. H\u00f2n bi l\u0103n t\u1eeb \u0111\u1ec9nh d\u1ed1c xu\u1ed1ng d\u01b0\u1edbi.","D. C\u1ea3 ba tr\u01b0\u1eddng h\u1ee3p tr\u00ean \u0111\u1ec1u c\u00f3 s\u1ef1 chuy\u1ec3n h\u00f3a th\u1ebf n\u0103ng th\u00e0nh \u0111\u1ed9ng n\u0103ng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2776},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai17/lv2/img\/h18.jpg'\/><\/center>C\u00f3 h\u1ec7 c\u01a1 h\u1ecdc nh\u01b0 h\u00ecnh v\u1ebd, b\u1ecf qua ma s\u00e1t, kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a l\u00f2 xo. L\u00fac \u0111\u1ea7u h\u1ec7 c\u00e2n b\u1eb1ng. N\u00e9n l\u00f2 xo m\u1ed9t \u0111o\u1ea1n l, sau \u0111\u00f3 th\u1ea3 ra. G\u1ecdi O l\u00e0 v\u1ecb tr\u00ed ban \u0111\u1ea7u c\u1ee7a v\u1eadt (v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng). Khi n\u00e9n l\u00f2 xo m\u1ed9t \u0111o\u1ea1n l, v\u1eadt \u1edf v\u1ecb tr\u00ed M, n\u0103ng l\u01b0\u1ee3ng c\u1ee7a h\u1ec7 d\u1ef1 tr\u1eef d\u01b0\u1edbi d\u1ea1ng n\u00e0o ? ","select":["A. \u0110\u1ed9ng n\u0103ng.","B. Th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.","C. Th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","D. C\u01a1 n\u0103ng."],"hint":"","explain":"<span class='basic_left'>Khi n\u00e9n l\u00f2 xo m\u1ed9t \u0111o\u1ea1n l n\u0103ng l\u01b0\u1ee3ng c\u1ee7a h\u1ec7 d\u1ef1 tr\u1eef d\u01b0\u1edbi d\u1ea1ng th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2777},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai17/lv2/img\/h19.jpg'\/><\/center>C\u00f3 h\u1ec7 c\u01a1 h\u1ecdc nh\u01b0 h\u00ecnh v\u1ebd, b\u1ecf qua ma s\u00e1t, kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a l\u00f2 xo. L\u00fac \u0111\u1ea7u h\u1ec7 c\u00e2n b\u1eb1ng. N\u00e9n l\u00f2 xo m\u1ed9t \u0111o\u1ea1n l, sau \u0111\u00f3 th\u1ea3 ra. Khi chuy\u1ec3n \u0111\u1ed9ng t\u1eeb M \u0111\u1ebfn O, \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u1ee7a v\u1eadt thay \u0111\u1ed5i th\u1ebf n\u00e0o? ","select":["A. \u0110\u1ed9ng n\u0103ng gi\u1ea3m, th\u1ebf n\u0103ng t\u0103ng.","B. \u0110\u1ed9ng n\u0103ng t\u0103ng v\u00e0 th\u1ebf n\u0103ng gi\u1ea3m.","C. \u0110\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng kh\u00f4ng thay \u0111\u1ed5i.","D. Ch\u1ec9 c\u00f3 \u0111\u1ed9ng n\u0103ng t\u0103ng c\u00f2n th\u1ebf n\u0103ng kh\u00f4ng \u0111\u1ed5i."],"hint":"","explain":"<span class='basic_left'>Khi chuy\u1ec3n \u0111\u1ed9ng t\u1eeb M \u0111\u1ebfn O, \u0111\u1ed9ng n\u0103ng t\u0103ng v\u00e0 th\u1ebf n\u0103ng gi\u1ea3m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2778},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai17/lv2/img\/h20.jpg'\/><\/center>C\u00f3 h\u1ec7 c\u01a1 h\u1ecdc nh\u01b0 h\u00ecnh v\u1ebd, b\u1ecf qua ma s\u00e1t, kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a l\u00f2 xo. L\u00fac \u0111\u1ea7u h\u1ec7 c\u00e2n b\u1eb1ng. N\u00e9n l\u00f2 xo m\u1ed9t \u0111o\u1ea1n l, sau \u0111\u00f3 th\u1ea3 ra. Khi chuy\u1ec3n \u0111\u1ed9ng t\u1eeb O \u0111\u1ebfn N, \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u1ee7a v\u1eadt thay \u0111\u1ed5i th\u1ebf n\u00e0o ? ","select":["A. \u0110\u1ed9ng n\u0103ng gi\u1ea3m, th\u1ebf n\u0103ng t\u0103ng.","B. \u0110\u1ed9ng n\u0103ng t\u0103ng v\u00e0 th\u1ebf n\u0103ng gi\u1ea3m.","C. \u0110\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng kh\u00f4ng thay \u0111\u1ed5i.","D. Ch\u1ec9 c\u00f3 \u0111\u1ed9ng n\u0103ng t\u0103ng c\u00f2n th\u1ebf n\u0103ng kh\u00f4ng \u0111\u1ed5i."],"hint":"","explain":"<span class='basic_left'>Khi chuy\u1ec3n \u0111\u1ed9ng t\u1eeb O \u0111\u1ebfn N \u0111\u1ed9ng n\u0103ng gi\u1ea3m, th\u1ebf n\u0103ng t\u0103ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2779}],"lesson":{"save":0,"level":2}}