{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o sau \u0111\u00e2y s\u1ebd x\u1ea3y ra khi nung n\u00f3ng m\u1ed9t v\u1eadt r\u1eafn?","select":["A. Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt t\u0103ng.","B. Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt gi\u1ea3m.","C. Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a v\u1eadt t\u0103ng.","D. Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a v\u1eadt gi\u1ea3m"],"hint":"","explain":"<span class='basic_left'>Khi nung n\u00f3ng m\u1ed9t v\u1eadt r\u1eafn, kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt kh\u00f4ng \u0111\u1ed5i nh\u01b0ng th\u1ec3 t\u00edch t\u0103ng l\u00ean n\u00ean kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a v\u1eadt gi\u1ea3m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2441},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"M\u1ed9t l\u1ecd th\u1ee7y tinh \u0111\u01b0\u1ee3c \u0111\u1eady b\u1eb1ng n\u00fat th\u1ee7y tinh. N\u00fat b\u1ecb k\u1eb9t. H\u1ecfi ph\u1ea3i m\u1edf n\u00fat b\u1eb1ng c\u00e1ch n\u00e0o trong c\u00e1c c\u00e1ch sau \u0111\u00e2y?","select":["A. H\u01a1 n\u00f3ng n\u00fat","B. H\u01a1 n\u00f3ng c\u1ed5 l\u1ecd","C. H\u01a1 n\u00f3ng c\u1ea3 n\u00fat v\u00e0 c\u1ed5 l\u1ecd","D. H\u01a1 n\u00f3ng \u0111\u00e1y l\u1ecd"],"hint":"","explain":"<span class='basic_left'>M\u1ed9t l\u1ecd th\u1ee7y tinh \u0111\u01b0\u1ee3c \u0111\u1eady b\u1eb1ng n\u00fat th\u1ee7y tinh. N\u00fat b\u1ecb k\u1eb9t ta c\u00f3 th\u1ec3 m\u1edf n\u00fat b\u1eb1ng c\u00e1ch c\u00e1ch h\u01a1 n\u00f3ng c\u1ed5 l\u1ecd. V\u00ec khi h\u01a1 n\u00f3ng, c\u1ed5 l\u1ecd n\u1edf ra, l\u00e0m l\u1ecfng n\u00fat, khi \u0111\u00f3 ta m\u1edf \u0111\u01b0\u1ee3c.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2442},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"Trong c\u00e1c c\u00e1ch s\u1eafp x\u1ebfp c\u00e1c ch\u1ea5t n\u00e0o v\u00ec nhi\u1ec7t d\u00e3n n\u1edf \u00edt t\u1edbi nhi\u1ec1u sau \u0111\u00e2y, c\u00e1ch n\u00e0o l\u00e0 \u0111\u00fang?","select":["A. Nh\u00f4m, \u0111\u1ed3ng, s\u1eaft","B. S\u1eaft, \u0111\u1ed3ng, nh\u00f4m ","C. S\u1eaft, nh\u00f4m, \u0111\u1ed3ng","D. \u0110\u1ed3ng, nh\u00f4m, s\u1eaft"],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2443},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"Khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, c\u00e1c tr\u1ee5 b\u00ea-t\u00f4ng c\u1ed1t th\u00e9p kh\u00f4ng b\u1ecb n\u1ee9t v\u00ec","select":["A. b\u00ea-t\u00f4ng v\u00e0 th\u00e9p kh\u00f4ng b\u1ecb n\u1edf v\u00ec nhi\u1ec7t.","B. b\u00ea-t\u00f4ng n\u1edf v\u00ec nhi\u1ec7t nhi\u1ec1u h\u01a1n th\u00e9p","C. b\u00ea-t\u00f4ng n\u1edf v\u00ec nhi\u1ec7t \u00edt h\u01a1n th\u00e9p.","D. b\u00ea-t\u00f4ng v\u00e0 th\u00e9p n\u1edf v\u00ec nhi\u1ec7t nh\u01b0 nhau"],"hint":"","explain":"<span class='basic_left'>Khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, c\u00e1c tr\u1ee5 b\u00ea-t\u00f4ng c\u1ed1t th\u00e9p kh\u00f4ng b\u1ecb n\u1ee9t v\u00ec b\u00ea-t\u00f4ng v\u00e0 th\u00e9p n\u1edf v\u00ec nhi\u1ec7t nh\u01b0 nhau.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2444},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"M\u1ed9t qu\u1ea3 c\u1ea7u b\u1eb1ng s\u1eaft b\u1ecb k\u1eb9t trong m\u1ed9t v\u00f2ng b\u1eb1ng s\u1eaft. \u0110\u1ec3 t\u00e1ch qu\u1ea3 c\u1ea7u ra kh\u1ecfi v\u00f2ng, th\u00ec ta n\u00ean:","select":["A. H\u01a1 n\u00f3ng c\u1ea3 qu\u1ea3 c\u1ea7u v\u00e0 v\u00f2ng.","B. H\u01a1 n\u00f3ng m\u1ed7i v\u00f2ng th\u00f4i.","C. H\u01a1 n\u00f3ng ri\u00eang qu\u1ea3 c\u1ea7u th\u00f4i.","D. L\u00e0m ngu\u1ed9i c\u1ea3 qu\u1ea3 c\u1ea7u v\u00e0 v\u00f2ng."],"hint":"","explain":"<span class='basic_left'>H\u01a1 n\u00f3ng v\u00f2ng s\u1ebd d\u00e3n ra v\u00e0 ta \u1ea5y \u0111\u01b0\u1ee3c qu\u1ea3 c\u1ea7u.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2445},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"C\u00f3 hai c\u1ed1c th\u1ee7y tinh ch\u1ed5ng kh\u00edt v\u00e0o nhau. M\u1ed9t b\u1ea1n h\u1ecdc sinh \u0111\u1ecbnh d\u00f9ng n\u01b0\u1edbc n\u00f3ng v\u00e0 n\u01b0\u1edbc \u0111\u00e1 \u0111\u1ec3 t\u00e1ch hai c\u1ed1c ra. ","select":["A. d\u00f9ng n\u01b0\u1edbc n\u00f3ng \u0111\u1ed5 v\u00e0o c\u1ed1c trong, ng\u00e2m c\u1ed1c ngo\u00e0i v\u00e0o n\u01b0\u1edbc \u0111\u00e1","B. d\u00f9ng n\u01b0\u1edbc \u0111\u00e1 \u0111\u1ed5 v\u00e0o c\u1ed1c trong, ng\u00e2m c\u1ed1c ngo\u00e0i v\u00e0o n\u01b0\u1edbc n\u00f3ng","C. d\u00f9ng n\u01b0\u1edbc \u0111\u00e1 \u0111\u1ed5 v\u00e0o c\u1ed1c trong, ng\u00e2m c\u1ed1c ngo\u00e0i v\u00e0o n\u01b0\u1edbc \u0111\u00e1","D. d\u00f9ng n\u01b0\u1edbc n\u00f3ng \u0111\u1ed5 v\u00e0o c\u1ed1c trong, ng\u00e2m c\u1ed1c ngo\u00e0i v\u00e0o n\u01b0\u1edbc n\u00f3ng"],"hint":"","explain":"<span class='basic_left'>L\u00e0m nh\u01b0 v\u1eady th\u00ec c\u1ed1c trong co l\u1ea1i, c\u1ed1c ngo\u00e0i gi\u00e3n ra v\u00e0 ch\u00fang t\u00e1ch nhau ra.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2446},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":"C\u00f3 m\u1ed9t qu\u1ea3 c\u1ea7u kh\u00f4ng th\u1ea3 l\u1ecdt v\u00f2ng kim lo\u1ea1i, mu\u1ed1n qu\u1ea3 c\u1ea7u th\u1ea3 l\u1ecdt v\u00f2ng kim lo\u1ea1i ta ph\u1ea3i (1)\u2026\u2026\u2026\u2026 v\u00f2ng kim lo\u1ea1i \u0111\u1ec3 n\u00f3 n\u1edf ra, ho\u1eb7c ta ph\u1ea3i (2)\u2026\u2026\u2026\u2026\u2026 qu\u1ea3 c\u1ea7u \u0111\u1ec3 n\u00f3 co l\u1ea1i.<br\/>\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng.","select":["A. 1-h\u01a1 n\u00f3ng, 2-l\u00e0m l\u1ea1nh","B. 1-l\u00e0m l\u1ea1nh,2-h\u01a1 n\u00f3ng","C. 1-l\u00e0m l\u1ea1nh,2-l\u00e0m l\u1ea1nh","D. 1-h\u01a1 n\u00f3ng, 2-h\u01a1 n\u00f3ng"],"hint":"","explain":"<span class='basic_left'> C\u00f3 m\u1ed9t qu\u1ea3 c\u1ea7u kh\u00f4ng th\u1ea3 l\u1ecdt v\u00f2ng kim lo\u1ea1i, mu\u1ed1n qu\u1ea3 c\u1ea7u th\u1ea3 l\u1ecdt v\u00f2ng kim lo\u1ea1i ta ph\u1ea3i h\u01a1 n\u00f3ng v\u00f2ng kim lo\u1ea1i \u0111\u1ec3 n\u00f3 n\u1edf ra, ho\u1eb7c ta ph\u1ea3i l\u00e0m l\u1ea1nh qu\u1ea3 c\u1ea7u \u0111\u1ec3 n\u00f3 co l\u1ea1i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2447},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"Ch\u1ea5t r\u1eafn \u2026\u2026\u2026 khi n\u00f3ng l\u00ean, co l\u1ea1i khi \u2026\u2026\u2026<br\/>\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng.","select":["A. d\u00e3n n\u1edf-n\u00f3ng l\u00ean","B. d\u00e3n n\u1edf-l\u1ea1nh \u0111i","C. co l\u1ea1i-n\u00f3ng l\u00ean","D. co l\u1ea1i-l\u1ea1nh \u0111i"],"hint":"","explain":"<span class='basic_left'>Ch\u1ea5t r\u1eafn d\u00e3n n\u1edf khi n\u00f3ng l\u00ean, co l\u1ea1i khi l\u1ea1nh \u0111i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2448},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":"T\u1ea1i sao khi l\u1ee3p nh\u00e0 b\u1eb1ng t\u00f4n, ng\u01b0\u1eddi ta ch\u1ec9 \u0111\u00f3ng \u0111inh m\u1ed9t \u0111\u1ea7u c\u00f2n \u0111\u1ea7u kia \u0111\u1ec3 t\u1ef1 do?","select":["A. \u0110\u1ec3 ti\u1ebft ki\u1ec7m \u0111inh","B. \u0110\u1ec3 t\u00f4n kh\u00f4ng b\u1ecb th\u1ee7ng nhi\u1ec1u l\u1ed7","C. \u0110\u1ec3 t\u00f4n d\u1ec5 d\u00e0ng co d\u00e3n v\u00ec nhi\u1ec7t","D. C\u1ea3 a, b, c \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>\u0110\u1ec3 t\u00f4n d\u1ec5 d\u00e0ng co d\u00e3n v\u00ec nhi\u1ec7t n\u00ean ng\u01b0\u1eddi ta kh\u00f4ng \u0111\u00f3ng \u0111inh hai \u0111\u1ea7u.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2449},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"\u1ede gi\u1eefa 2 thanh ray tr\u00ean \u0111\u01b0\u1eddng ray xe l\u1eeda, t\u1ea1i sao ng\u01b0\u1eddi ta kh\u00f4ng n\u1ed1i li\u1ec1n 2 thanh m\u00e0 l\u1ea1i \u0111\u1ec3 m\u1ed9t kho\u1ea3ng h\u1edf?","select":["A. Kh\u00f4ng c\u00f3 nguy\u00ean nh\u00e2n n\u00e0o","B. Ti\u1ebft ki\u1ec7m nguy\u00ean li\u1ec7u","C. \u0110\u1ec3 cho \u0111\u1eb9p","D. \u0110\u1ec3 khi 2 thanh ray d\u00e3n n\u1edf v\u00ec nhi\u1ec7t th\u00ec \u0111\u01b0\u1eddng ray kh\u00f4ng b\u1ecb cong"],"hint":"","explain":"<span class='basic_left'>V\u00ec thanh ray l\u00e0m b\u1eb1ng th\u00e9p, n\u00ean d\u00e3n n\u1edf v\u00ec nhi\u1ec7t r\u1ea5t nhi\u1ec1u, v\u00ec v\u1eady ng\u01b0\u1eddi ta ph\u1ea3i l\u00e0m khe h\u1edf \u0111\u1ec3 khi thanh ray d\u00e3n n\u1edf th\u00ec tr\u00e1nh cho \u0111\u01b0\u1eddng ray kh\u00f4ng b\u1ecb cong.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2450}],"lesson":{"save":0,"level":2}}