{"segment":[{"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 \u0111o\u00e0n t\u00e0u \u0111ang chuy\u1ec3n \u0111\u1ed9ng tr\u00ean \u0111\u01b0\u1eddng n\u1eb1m ngang th\u00ec \u00e1p l\u1ef1c c\u00f3 \u0111\u1ed9 l\u1edbn b\u1eb1ng l\u1ef1c n\u00e0o ?","select":["A. L\u1ef1c k\u00e9o do \u0111\u1ea7u t\u00e0u t\u00e1c d\u1ee5ng l\u00ean toa t\u00e0u.","B. Tr\u1ecdng l\u1ef1c c\u1ee7a t\u00e0u.","C. L\u1ef1c ma s\u00e1t gi\u1eefa t\u00e0u v\u00e0 \u0111\u01b0\u1eddng ray.","D. C\u1ea3 ba l\u1ef1c tr\u00ean."],"hint":"","explain":"<span class='basic_left'>Khi \u0111o\u00e0n t\u00e0u \u0111ang chuy\u1ec3n \u0111\u1ed9ng tr\u00ean \u0111\u01b0\u1eddng n\u1eb1m ngang th\u00ec \u00e1p l\u1ef1c c\u00f3 \u0111\u1ed9 l\u1edbn b\u1eb1ng tr\u1ecdng l\u1ef1c c\u1ee7a t\u00e0u. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2600},{"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\u01a1n v\u1ecb kh\u00f4ng ph\u1ea3i c\u1ee7a \u00e1p l\u1ef1c l\u00e0:","select":["A. N\/${{m}^{2}}$ . ","B. Pa.","C. N.","D. N\/${c{m}^{2}}$ ."],"hint":"","explain":"<span class='basic_left'>\u0110\u01a1n v\u1ecb c\u1ee7a \u00e1p l\u1ef1c l\u00e0: N\/${{m}^{2}}$, N\/${c{m}^{2}}$ ho\u1eb7c Pa.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2601},{"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":"T\u00e1c d\u1ee5ng c\u1ee7a \u00e1p l\u1ef1c ph\u1ee5 thu\u1ed9c v\u00e0o:","select":["A. Ph\u01b0\u01a1ng c\u1ee7a l\u1ef1c.","B. Chi\u1ec1u c\u1ee7a l\u1ef1c.","C. \u0110i\u1ec3m \u0111\u1eb7t c\u1ee7a l\u1ef1c.","D. \u0110\u1ed9 l\u1edbn c\u1ee7a \u00e1p l\u1ef1c v\u00e0 di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p."],"hint":"","explain":"<span class='basic_left'>T\u00e1c d\u1ee5ng c\u1ee7a \u00e1p l\u1ef1c ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 l\u1edbn c\u1ee7a \u00e1p l\u1ef1c v\u00e0 di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2602},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ch\u1ec9 ra k\u1ebft lu\u1eadn sai trong c\u00e1c k\u1ebft lu\u1eadn sau: ","select":["A. \u00c1p l\u1ef1c l\u00e0 l\u1ef1c \u00e9p c\u00f3 ph\u01b0\u01a1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t b\u1ecb \u00e9p.","B. \u0110\u01a1n v\u1ecb c\u1ee7a \u00e1p su\u1ea5t l\u00e0 N\/${{m}^{2}}$.","C. \u00c1p su\u1ea5t l\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a \u00e1p l\u1ef1c tr\u00ean m\u1ed9t di\u1ec7n t\u00edch b\u1ecb \u00e9p.","D. \u0110\u01a1n v\u1ecb c\u1ee7a \u00e1p l\u1ef1c l\u00e0 \u0111\u01a1n v\u1ecb c\u1ee7a l\u1ef1c."],"hint":"","explain":"<span class='basic_left'>\u0110\u01a1n v\u1ecb c\u1ee7a \u00e1p l\u1ef1c kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u01a1n v\u1ecb c\u1ee7a l\u1ef1c. \u0110\u01a1n v\u1ecb c\u1ee7a \u00e1p l\u1ef1c b\u1eb1ng \u0111\u01a1n v\u1ecb c\u1ee7a l\u1ef1c chia cho \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2603},{"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 nh\u00fang m\u1ed9t kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng v\u00e0o n\u01b0\u1edbc, m\u1eb7t n\u00e0o c\u1ee7a kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng ch\u1ecbu \u00e1p l\u1ef1c l\u1edbn nh\u1ea5t c\u1ee7a n\u01b0\u1edbc?","select":["A. \u00c1p l\u1ef1c nh\u01b0 nhau \u1edf c\u1ea3 6 m\u1eb7t.","B. M\u1eb7t tr\u00ean.","C. M\u1eb7t d\u01b0\u1edbi.","D. C\u00e1c m\u1eb7t b\u00ean."],"hint":"","explain":"<span class='basic_left'>Khi nh\u00fang m\u1ed9t kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng v\u00e0o n\u01b0\u1edbc, m\u1eb7t d\u01b0\u1edbi c\u1ee7a kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng ch\u1ecbu \u00e1p l\u1ef1c l\u1edbn nh\u1ea5t c\u1ee7a n\u01b0\u1edbc, v\u00ec ch\u00ecm trong n\u01b0\u1edbc s\u00e2u nh\u1ea5t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2604},{"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":"C\u00f4ng th\u1ee9c n\u00e0o sau \u0111\u00e2y l\u00e0 c\u00f4ng th\u1ee9c t\u00ednh \u00e1p su\u1ea5t:","select":["A. $p=\\dfrac{F}{S}$.","B. $p=F\\times s$.","C. $p=\\dfrac{P}{S}$.","D. $p=d\\times V$."],"hint":"","explain":"<span class='basic_left'>\u00c1p su\u1ea5t b\u1eb1ng t\u1ef7 s\u1ed1 l\u1ef1c tr\u00ean di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2605},{"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":"Mu\u1ed1n t\u0103ng \u00e1p su\u1ea5t th\u00ec:","select":["A. Gi\u1ea3m di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 gi\u1ea3m \u00e1p l\u1ef1c theo c\u00f9ng t\u1ec9 l\u1ec7.","B. Gi\u1ea3m di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 t\u0103ng \u00e1p l\u1ef1c.","C. T\u0103ng di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 t\u0103ng \u00e1p l\u1ef1c theo c\u00f9ng t\u1ec9 l\u1ec7.","D. T\u0103ng di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 gi\u1ea3m \u00e1p l\u1ef1c."],"hint":"","explain":"<span class='basic_left'>Mu\u1ed1n t\u0103ng \u00e1p su\u1ea5t th\u00ec gi\u1ea3m di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 t\u0103ng \u00e1p l\u1ef1c, v\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2606},{"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":"Mu\u1ed1n gi\u1ea3m \u00e1p su\u1ea5t th\u00ec:","select":["A. Gi\u1ea3m di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 gi\u1ea3m \u00e1p l\u1ef1c theo c\u00f9ng t\u1ec9 l\u1ec7.","B. T\u0103ng di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 t\u0103ng \u00e1p l\u1ef1c theo c\u00f9ng t\u1ec9 l\u1ec7.","C. T\u0103ng di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 gi\u1eef nguy\u00ean \u00e1p l\u1ef1c.","D. Gi\u1ea3m di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 gi\u1eef nguy\u00ean \u00e1p l\u1ef1c."],"hint":"","explain":"<span class='basic_left'> V\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c n\u00ean khi t\u0103ng di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p v\u00e0 gi\u1eef nguy\u00ean \u00e1p l\u1ef1c th\u00ec \u00e1p su\u1ea5t gi\u1ea3m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2607},{"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":"\u0110\u01a1n v\u1ecb \u0111o \u00e1p su\u1ea5t l\u00e0:","select":["A. N\/${{m}^{2}}$","B. N\/${{m}^{3}}$","C. Kg\/${{m}^{3}}$","D. N"],"hint":"","explain":"<span class='basic_left'> \u0110\u01a1n v\u1ecb \u0111o \u00e1p su\u1ea5t l\u00e0 N\/${{m}^{2}}$<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2608},{"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\u01a1n v\u1ecb n\u00e0o sau \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u00e1p su\u1ea5t ?","select":["A. N\/${{m}^{2}}$.","B. Pa.","C. N\/${{m}^{3}}$.","D. kPa."],"hint":"","explain":"<span class='basic_left'>N\/${{m}^{3}}$ kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u00e1p su\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2609},{"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":"Trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau \u0111\u00e2y, tr\u01b0\u1eddng h\u1ee3p n\u00e0o \u00e1p l\u1ef1c nh\u1ecf nh\u1ea5t: ","select":["A. Khi th\u1ea7y Giang x\u00e1ch c\u1eb7p \u0111\u1ee9ng b\u1eb1ng hai ch\u00e2n tr\u00ean b\u1ee5c gi\u1ea3ng.","B. Khi th\u1ea7y Giang x\u00e1ch c\u1eb7p \u0111\u1ee9ng \u0111\u1ee9ng co m\u1ed9t ch\u00e2n.","C. Khi th\u1ea7y Giang kh\u00f4ng x\u00e1ch c\u1eb7p \u0111\u1ee9ng b\u1eb1ng hai ch\u00e2n","D. Khi th\u1ea7y Giang kh\u00f4ng x\u00e1ch c\u1eb7p \u0111\u1ee9ng co m\u1ed9t ch\u00e2n."],"hint":"","explain":"- \u00c1p l\u1ef1c l\u00e0 l\u1ef1c \u00e9p c\u00f3 ph\u01b0\u01a1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t b\u1ecb \u00e9p. <br\/> - T\u00e1c d\u1ee5ng c\u1ee7a \u00e1p l\u1ef1c c\u00e0ng l\u1edbn khi \u0111\u1ed9 l\u1edbn c\u1ee7a \u00e1p l\u1ef1c c\u00e0ng l\u1edbn hay di\u1ec7n t\u00edch m\u1eb7t b\u1ecb \u00e9p c\u00e0ng nh\u1ecf. <br\/> => \u00c1p l\u1ef1c nh\u1ecf nh\u1ea5t khi l\u1ef1c nh\u1ecf v\u00e0 di\u1ec7n t\u00edch m\u1eb7t \u00e9p l\u1edbn <br\/> => Khi th\u1ea7y Giang kh\u00f4ng x\u00e1ch c\u1eb7p \u0111\u1ee9ng b\u1eb1ng hai ch\u00e2n \u00e1p l\u1ef1c l\u00e0 nh\u1ecf nh\u1ea5t<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2610},{"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 \u0111\u00e2y, tr\u01b0\u1eddng h\u1ee3p n\u00e0o \u00e1p su\u1ea5t l\u1edbn nh\u1ea5t: ","select":["A. Khi th\u1ea7y Giang x\u00e1ch c\u1eb7p \u0111\u1ee9ng b\u1eb1ng hai ch\u00e2n tr\u00ean b\u1ee5c gi\u1ea3ng.","B. Khi th\u1ea7y Giang x\u00e1ch c\u1eb7p \u0111\u1ee9ng co m\u1ed9t ch\u00e2n.","C. Khi th\u1ea7y Giang kh\u00f4ng x\u00e1ch c\u1eb7p \u0111\u1ee9ng co m\u1ed9t ch\u00e2n v\u00e0 nh\u00f3n ch\u00e2n c\u00f2n l\u1ea1i.","D. Khi th\u1ea7y Giang x\u00e1ch c\u1eb7p \u0111\u1ee9ng co m\u1ed9t ch\u00e2n v\u00e0 nh\u00f3n ch\u00e2n c\u00f2n l\u1ea1i."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c n\u00ean khi th\u1ea7y Giang x\u00e1ch c\u1eb7p \u0111\u1ee9ng co m\u1ed9t ch\u00e2n v\u00e0 nh\u00f3n ch\u00e2n c\u00f2n l\u1ea1i th\u00ec \u00e1p l\u1ef1c l\u1edbn v\u00e0 di\u1ec7n t\u00edch nh\u1ecf d\u1eabn \u0111\u1ebfn \u00e1p su\u1ea5t l\u1edbn. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2611},{"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":"Trong c\u00e1c c\u00e1ch sau, c\u00e1ch n\u00e0o t\u0103ng \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t nhi\u1ec1u nh\u1ea5t? ","select":["A. T\u0103ng \u00e1p l\u1ef1c, gi\u1ea3m di\u1ec7n t\u00edch b\u1ecb \u00e9p.","B. T\u0103ng \u00e1p l\u1ef1c, t\u0103ng di\u1ec7n t\u00edch b\u1ecb \u00e9p.","C. Gi\u1ea3m \u00e1p l\u1ef1c, gi\u1ea3m di\u1ec7n t\u00edch b\u1ecb \u00e9p.","D. Gi\u1ea3m \u00e1p l\u1ef1c, t\u0103ng di\u1ec7n t\u00edch b\u1ecb \u00e9p."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c n\u00ean khi t\u0103ng \u00e1p l\u1ef1c, gi\u1ea3m di\u1ec7n t\u00edch b\u1ecb \u00e9p th\u00ec t\u0103ng \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t nhi\u1ec1u nh\u1ea5t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2612},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai7/lv2/img\/h14.jpg'\/><\/center>Cho h\u00ecnh v\u1ebd tr\u00ean, tr\u01b0\u1eddng h\u1ee3p n\u00e0o \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean s\u00e0n l\u1edbn nh\u1ea5t?","select":["A. Tr\u01b0\u1eddng h\u1ee3p 1.","B. Tr\u01b0\u1eddng h\u1ee3p 2.","C. Tr\u01b0\u1eddng h\u1ee3p 3.","D. Tr\u01b0\u1eddng h\u1ee3p 4."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c n\u00ean trong tr\u01b0\u1eddng h\u1ee3p 4, kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn v\u00e0 di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c nh\u1ecf n\u00ean \u00e1p su\u1ea5t l\u1edbn.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2613},{"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":"C\u00f9ng m\u1ed9t l\u1ef1c nh\u01b0 nhau t\u00e1c d\u1ee5ng l\u00ean hai v\u1eadt kh\u00e1c nhau. Di\u1ec7n t\u00edch t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c l\u00ean v\u1eadt A l\u1edbn g\u1ea5p \u0111\u00f4i di\u1ec7n t\u00edch l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt B th\u00ec: ","select":["A. \u00c1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt A l\u1edbn g\u1ea5p \u0111\u00f4i \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt B.","B. \u00c1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt B l\u1edbn g\u1ea5p \u0111\u00f4i \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt A.","C. \u00c1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean hai v\u1eadt nh\u01b0 nhau.","D. \u00c1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt A l\u1edbn g\u1ea5p b\u1ed1n l\u1ea7n \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt B."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c n\u00ean:<br\/> C\u00f9ng m\u1ed9t l\u1ef1c nh\u01b0 nhau t\u00e1c d\u1ee5ng l\u00ean hai v\u1eadt kh\u00e1c nhau. Di\u1ec7n t\u00edch t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c l\u00ean v\u1eadt A l\u1edbn g\u1ea5p \u0111\u00f4i di\u1ec7n t\u00edch l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt B th\u00ec \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt B l\u1edbn g\u1ea5p \u0111\u00f4i \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt A.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2614},{"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":"Ch\u1ecdn c\u00e2u \u0111\u00fang: ","select":["A. Khi n\u1eb1m tr\u00ean \u0111\u1ec7m m\u00fat ta th\u1ea5y \u00eam h\u01a1n tr\u00ean ph\u1ea3n g\u1ed7 v\u00ec \u0111\u1ec7m m\u00fat d\u1ea7y h\u01a1n ph\u1ea3n g\u1ed7 n\u00ean \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean ng\u01b0\u1eddi gi\u1ea3m","B. Nh\u1eefng c\u1ed9t \u0111\u00ecnh l\u00e0ng th\u01b0\u1eddng k\u00ea tr\u00ean nh\u1eefng h\u00f2n \u0111\u00e1 r\u1ed9ng v\u00e0 ph\u1eb3ng \u0111\u1ec3 l\u00e0m gi\u1ea3m \u00e1p su\u1ea5t g\u00e2y ra l\u00ean m\u1eb7t \u0111\u1ea5t.","C. \u0110\u01b0\u1eddng ray ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean nh\u1eefng thanh t\u00e0 v\u1eb9t \u0111\u1ec3 l\u00e0m t\u0103ng \u00e1p l\u1ef1c l\u00ean m\u1eb7t \u0111\u1ea5t khi t\u00e0u h\u1ecfa ch\u1ea1y qua.","D. \u0110\u1eb7t v\u00e1n l\u00ean b\u00f9n (\u0111\u1ea5t) \u00edt b\u1ecb l\u00fan h\u01a1n khi \u0111i b\u1eb1ng ch\u00e2n kh\u00f4ng v\u00ec s\u1ebd l\u00e0m gi\u1ea3m \u00e1p l\u1ef1c c\u1ee7a c\u01a1 th\u1ec3 l\u00ean b\u00f9n \u0111\u1ea5t."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c n\u00ean nh\u1eefng c\u1ed9t \u0111\u00ecnh l\u00e0ng th\u01b0\u1eddng k\u00ea tr\u00ean nh\u1eefng h\u00f2n \u0111\u00e1 r\u1ed9ng nh\u1eb1m t\u0103ng di\u1ec7n t\u00edch ti\u1ebfp x\u00fac, gi\u1ea3m \u00e1p l\u1ef1c l\u00ean n\u1ec1n \u0111\u1ea5t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2615},{"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":"M\u00f3ng nh\u00e0 ph\u1ea3i x\u00e2y r\u1ed9ng b\u1ea3n h\u01a1n t\u01b0\u1eddng v\u00ec?","select":["A. \u0110\u1ec3 gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a t\u01b0\u1eddng xu\u1ed1ng m\u1eb7t \u0111\u1ea5t.","B. \u0110\u1ec3 t\u0103ng tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a t\u01b0\u1eddng xu\u1ed1ng m\u1eb7t \u0111\u1ea5t.","C. \u0110\u1ec3 t\u0103ng \u00e1p su\u1ea5t l\u00ean m\u1eb7t \u0111\u1ea5t.","D. \u0110\u1ec3 gi\u1ea3m \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean m\u1eb7t \u0111\u1ea5t."],"hint":"","explain":"<span class='basic_left'>M\u00f3ng nh\u00e0 ph\u1ea3i x\u00e2y r\u1ed9ng b\u1ea3n h\u01a1n t\u01b0\u1eddng \u0111\u1ec3 t\u0103ng di\u1ec7n t\u00edch ti\u1ebfp x\u00fac xu\u1ed1ng b\u00ean d\u01b0\u1edbi, l\u00e0m gi\u1ea3m \u00e1p su\u1ea5t xu\u1ed1ng \u0111\u1ea5t, tr\u00e1nh m\u00f3ng nh\u00e0 b\u1ecb l\u00fan. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2616},{"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 \u0111\u00f3ng \u0111inh v\u00e0o t\u01b0\u1eddng ta th\u01b0\u1eddng \u0111\u00f3ng m\u0169i \u0111inh v\u00e0o t\u01b0\u1eddng m\u00e0 kh\u00f4ng \u0111\u00f3ng m\u0169 (tai) \u0111inh v\u00e0o. T\u1ea1i sao v\u1eady? ","select":["A. \u0110\u00f3ng m\u0169i \u0111inh v\u00e0o t\u01b0\u1eddng \u0111\u1ec3 t\u0103ng \u00e1p l\u1ef1c t\u00e1c d\u1ee5ng n\u00ean \u0111inh d\u1ec5 v\u00e0o h\u01a1n.","B. M\u0169i \u0111inh c\u00f3 di\u1ec7n t\u00edch nh\u1ecf n\u00ean v\u1edbi c\u00f9ng \u00e1p l\u1ef1c th\u00ec c\u00f3 th\u1ec3 g\u00e2y ra \u00e1p su\u1ea5t l\u1edbn n\u00ean \u0111inh d\u1ec5 v\u00e0o h\u01a1n.","C. M\u0169 \u0111inh c\u00f3 di\u1ec7n t\u00edch l\u1edbn n\u00ean \u00e1p l\u1ef1c nh\u1ecf v\u00ec v\u1eady \u0111inh kh\u00f3 v\u00e0o h\u01a1n.","D. \u0110\u00f3ng m\u0169i \u0111inh v\u00e0o t\u01b0\u1eddng l\u00e0 do th\u00f3i quen c\u00f2n \u0111\u00f3ng \u0111\u1ea7u n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u00e1p su\u1ea5t t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c v\u00e0 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi di\u1ec7n t\u00edch ch\u1ecbu \u00e1p l\u1ef1c n\u00ean d\u00f9ng m\u0169i \u0111inh c\u00f3 di\u1ec7n t\u00edch nh\u1ecf n\u00ean v\u1edbi c\u00f9ng \u00e1p l\u1ef1c th\u00ec c\u00f3 th\u1ec3 g\u00e2y ra \u00e1p su\u1ea5t l\u1edbn n\u00ean \u0111inh d\u1ec5 v\u00e0o h\u01a1n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2617},{"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 n\u1eb1m tr\u00ean \u0111\u1ec7m m\u00fat ta th\u1ea5y \u00eam h\u01a1n khi n\u1eb1m tr\u00ean ph\u1ea3n g\u1ed7. T\u1ea1i sao v\u1eady? ","select":["A. V\u00ec \u0111\u1ec7m m\u00fat m\u1ec1m h\u01a1n ph\u1ea3n g\u1ed7 n\u00ean \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean ng\u01b0\u1eddi gi\u1ea3m.","B. V\u00ec \u0111\u1ec7m m\u00fat d\u1ea7y h\u01a1n ph\u1ea3n g\u1ed7 n\u00ean \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean ng\u01b0\u1eddi gi\u1ea3m.","C. V\u00ec \u0111\u1ec7m m\u00fat d\u1ec5 bi\u1ebfn d\u1ea1ng \u0111\u1ec3 t\u0103ng di\u1ec7n t\u00edch ti\u1ebfp x\u00fac v\u00ec v\u1eady gi\u1ea3m \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean th\u00e2n ng\u01b0\u1eddi.","D. V\u00ec l\u1ef1c t\u00e1c d\u1ee5ng c\u1ee7a ph\u1ea3n g\u1ed7 v\u00e0o th\u00e2n ng\u01b0\u1eddi l\u1edbn h\u01a1n."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u0111\u1ec7m m\u00fat d\u1ec5 bi\u1ebfn d\u1ea1ng \u0111\u1ec3 t\u0103ng di\u1ec7n t\u00edch ti\u1ebfp x\u00fac v\u00ec v\u1eady gi\u1ea3m \u00e1p su\u1ea5t t\u00e1c d\u1ee5ng l\u00ean th\u00e2n ng\u01b0\u1eddi.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2618},{"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":"V\u1eadt th\u1ee9 nh\u1ea5t c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 0,5 kg, v\u1eadt th\u1ee9 hai c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg. H\u00e3y so s\u00e1nh \u00e1p su\u1ea5t $p_1$ v\u00e0 $p_2$ c\u1ee7a hai v\u1eadt tr\u00ean m\u1eb7t s\u00e0n n\u1eb1m ngang.","select":["A. $p_1$ = $p_2$ .","B. $p_1$ = 2$p_2$ .","C. 2$p_1$ = $p_2$ .","D. Kh\u00f4ng so s\u00e1nh \u0111\u01b0\u1ee3c."],"hint":"","explain":"<span class='basic_left'>Kh\u00f4ng so s\u00e1nh \u0111\u01b0\u1ee3c v\u00ec ch\u01b0a bi\u1ebft di\u1ec7n t\u00edch ti\u1ebfp x\u00fac c\u1ee7a hai v\u1eadt l\u00ean s\u00e0n nh\u00e0 l\u00e0 bao nhi\u00eau. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2619}],"lesson":{"save":0,"level":2}}