{"segment":[{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"H\u00e3y ch\u1ec9 ra c\u00e2u sai.","select":["A. Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a t\u00fai \u0111\u01b0\u1eddng ch\u1ec9 l\u01b0\u1ee3ng \u0111\u01b0\u1eddng ch\u1ee9a trong t\u00fai.","B. Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t ng\u01b0\u1eddi l\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c h\u00fat c\u1ee7a Tr\u00e1i \u0110\u1ea5t t\u00e1c d\u1ee5ng l\u00ean ng\u01b0\u1eddi \u0111\u00f3.","C. Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt \u0111\u00f3.","D. Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a n\u00f3."],"hint":"","explain":"<span class='basic_left'>Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a n\u00f3 , v\u1eadt lu\u00f4n c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng nh\u01b0ng c\u00f3 khi kh\u00f4ng c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng. V\u1eady c\u00e2u kh\u00f4ng \u0111\u00fang l\u00e0: Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a n\u00f3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2371},{"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":"V\u1edbi m\u1ed9t c\u00e2n R\u00f4becvan v\u00e0 h\u1ed9p qu\u1ea3 c\u00e2n, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y \u0111\u00fang?","select":["A. \u0110CNN c\u1ee7a c\u00e2n l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a qu\u1ea3 c\u00e2n nh\u1ecf nh\u1ea5t","B. GH\u0110 c\u1ee7a c\u00e2n l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn nh\u1ea5t ghi tr\u00ean c\u00e2n","C. GH\u0110 c\u1ee7a c\u00e2n l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a qu\u1ea3 c\u00e2n nh\u1ecf nh\u1ea5t","D. \u0110CNN c\u1ee7a c\u00e2n l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a qu\u1ea3 c\u00e2n l\u1edbn nh\u1ea5t"],"hint":"","explain":"<span class='basic_left'>\u0110CNN c\u1ee7a c\u00e2n l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a qu\u1ea3 c\u00e2n nh\u1ecf nh\u1ea5t<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2372},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":"K\u1ebft lu\u1eadn n\u00e0o sai khi n\u00f3i v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt? ","select":["A. Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a tr\u1ecdng l\u1ef1c.","B. Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt t\u1ec9 l\u1ec7 v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt","C. Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt t\u1ec9 l\u1ec7 v\u1edbi th\u1ec3 t\u00edch v\u1eadt.","D. C\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt b\u1eb1ng l\u1ef1c k\u1ebf. "],"hint":"","explain":"<span class='basic_left'>Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt t\u1ec9 l\u1ec7 v\u1edbi th\u1ec3 t\u00edch v\u1eadt l\u00e0 SAI.Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt t\u1ec9 l\u1ec7 v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2373},{"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":"Khi c\u00e2n m\u1ed9t t\u00fai k\u1eb9o th\u00ec ta quan t\u00e2m \u0111\u1ebfn \u2026\u2026\u2026\u2026\u2026c\u1ee7a t\u00fai k\u1eb9o.","select":["A. tr\u1ecdng l\u01b0\u1ee3ng","B. kh\u1ed1i l\u01b0\u1ee3ng","C. th\u1ec3 t\u00edch","D. tr\u1ecdng l\u1ef1c"],"hint":"","explain":"<span class='basic_left'>Khi c\u00e2n m\u1ed9t t\u00fai k\u1eb9o th\u00ec ta quan t\u00e2m \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a t\u00fai k\u1eb9o.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2374},{"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 quy\u1ec3n v\u1edf c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 70g th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng bao nhi\u00ean niu-t\u01a1n?","select":["A. 0,07N","B. 0,7N","C. 7N","D. 70N"],"hint":"","explain":"<span class='basic_left'>Ta c\u00f3 P = 10m, n\u00ean quy\u1ec3n v\u1edf c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 70g = 0,07kg th\u00ec P = 0,7N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2375},{"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":"Trong c\u00e1c c\u00e2u sau \u0111\u00e2y, c\u00e2u n\u00e0o \u0111\u00fang?","select":["A. L\u1ef1c k\u1ebf l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o kh\u1ed1i l\u01b0\u1ee3ng","B. C\u00e2n R\u00f4b\u00e9cvan l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o tr\u1ecdng l\u01b0\u1ee3ng","C. L\u1ef1c k\u1ebf l\u00e0 d\u1ee5ng c\u1ee5 \u0111\u1ec3 \u0111o c\u1ea3 tr\u1ecdng l\u01b0\u1ee3ng l\u1eabn kh\u1ed1i l\u01b0\u1ee3ng","D. L\u1ef1c k\u1ebf l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o l\u1ef1c, c\u00f2n c\u00e2n R\u00f4b\u00e9cvan l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o kh\u1ed1i l\u01b0\u1ee3ng."],"hint":"","explain":"<span class='basic_left'>L\u1ef1c k\u1ebf l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o l\u1ef1c, c\u00f2n c\u00e2n R\u00f4b\u00e9cvan l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o kh\u1ed1i l\u01b0\u1ee3ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2376},{"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":"<span class='basic_left'>T\u00ecm t\u1eeb th\u00edch h\u1ee3p \u0111\u1ec3 \u0111i\u1ec1n v\u00e0o ch\u1ed7 tr\u1ed1ng trong c\u00e2u d\u01b0\u1edbi \u0111\u00e2y: <br\/>L\u1ef1c \u0111\u00e0n h\u1ed3i t\u1ea1o ra b\u1edfi c\u00e1c l\u00f2 xo \u0111\u1ee1 tr\u1ee5c c\u1ee7a b\u00e1nh xe t\u00e0u h\u1ecfa ph\u1ea3i v\u00e0o c\u1ee1 \u2026\u2026\u2026\u2026\u2026\u2026<\/span>","select":["A. v\u00e0i ph\u1ea7n m\u01b0\u1eddi niu-t\u01a1n","B. v\u00e0i niu-t\u01a1n","C. v\u00e0i tr\u0103m niu-t\u01a1n","D. v\u00e0i tr\u0103m ngh\u00ecn niu-t\u01a1n"],"hint":"","explain":"<span class='basic_left'>L\u1ef1c \u0111\u00e0n h\u1ed3i t\u1ea1o ra b\u1edfi c\u00e1c l\u00f2 xo \u0111\u1ee1 tr\u1ee5c c\u1ee7a b\u00e1nh xe t\u00e0u h\u1ecfa ph\u1ea3i v\u00e0o c\u1ee1 v\u00e0i tr\u0103m ngh\u00ecn niu-t\u01a1n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2377},{"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":"M\u1ed9t h\u00f2n g\u1ea1ch c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1600 gam. M\u1ed9t \u0111\u1ed1ng g\u1ea1ch c\u00f3 10000 vi\u00ean s\u1ebd n\u1eb7ng\u2026\u2026\u2026\u2026\u2026 niu-t\u01a1n.","select":["A. 80000","B. 1600000","C. 16000","D. 160000"],"hint":"","explain":"<span class='basic_left'>M\u1ed9t h\u00f2n g\u1ea1ch c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1.600g, tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 16N. M\u1ed9t \u0111\u1ed1ng g\u1ea1ch c\u00f3 10.000 vi\u00ean s\u1ebd n\u1eb7ng 160.000N<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2378},{"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":"20 th\u1ebfp gi\u1ea5y n\u1eb7ng 18,4 niu-t\u01a1n. M\u1ed7i th\u1ebfp gi\u1ea5y s\u1ebd c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng....... gam","select":["A. 18,4","B. 1,086","C. 92","D. 0,92"],"hint":"","explain":"<span class='basic_left'>20 th\u1ebfp gi\u1ea5y n\u1eb7ng 18,4N = 1,84kg.V\u1eady 1 th\u1ebfp gi\u1ea5y n\u1eb7ng: $\\dfrac{1,84}{20}=0,092kg=92g$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2379},{"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":"Khi treo m\u1ed9t v\u1eadt kh\u1ed1i l\u01b0\u1ee3ng $m_1$ v\u00e0o l\u1ef1c k\u1ebf th\u00ec \u0111\u1ed9 d\u00e0i th\u00eam ra c\u1ee7a l\u00f2 xo l\u1ef1c k\u1ebf l\u00e0 $\u2206l_1$ = 3cm. N\u1ebfu l\u1ea7n l\u01b0\u1ee3t treo v\u00e0o l\u1ef1c k\u1ebf c\u00e1c v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng $m_2$ = $2m_1$, $m_3$ = $\\dfrac{1}{3}$ $m_1$th\u00ec \u0111\u1ed9 d\u00e0i th\u00eam ra c\u1ee7a l\u00f2 xo l\u1ef1c k\u1ebf s\u1ebd l\u1ea7n l\u01b0\u1ee3t l\u00e0:","select":["A.$\u2206l_2$ = 1,5cm;$\u2206l_3$ = 9cm","B.$\u2206l_2$ = 6cm;$\u2206l_3$ = 1cm","C.$\u2206l_2$ = 2cm;$\u2206l_3$ = $\\dfrac{1}{3}$cm","D.$\u2206l_2$= $\\dfrac{1}{3}$cm;$\u2206l_3$ = 2cm"],"hint":"","explain":"<span class='basic_left'>N\u1ebfu $m_2$\u00ad = 2$m_1$ th\u00ec \u0111\u1ed9 d\u00e0i th\u00eam ra c\u1ee7a l\u00f2 xo $\u2206l_2$ = 2$\u2206l_1$= 2.3 = 6cm.<br\/>N\u1ebfu $m_3$ = $\\dfrac{1}{3}$ $m_1$ th\u00ec \u0111\u1ed9 d\u00e0i th\u00eam ra c\u1ee7a l\u00f2 xo l\u00e0 $\u2206l_3$ = $\\dfrac{1}{3}$ $\u2206l_1$ = $\\dfrac{1}{3}$ . 3 = 1cm<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2380}],"lesson":{"save":0,"level":2}}