{"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":10,"ques":"\u0110\u1ed5i 1(kg\/${{m}^{3}}$) th\u00e0nh\u2026.(g\/${{m}^{3}}$ ):","select":["A. 10","B. 100","C. 1000","D. 10000"],"hint":"","explain":"<span class='basic_left'>1kg = 1000g n\u00ean 1(kg\/${{m}^{3}}$) = 1000(g\/${{m}^{3}}$ )<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2381},{"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":"T\u00ecm tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 10kg.","select":["A. 10N","B. 100N","C. 1000N","D. 10000N"],"hint":"","explain":"<span class='basic_left'>V\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 10N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2382},{"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 h\u1ed9p b\u00fat c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 150g th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng b\u1eb1ng bao nhi\u00eau niut\u01a1n?","select":["A. 0,15N","B. 1,5N","C. 15N","D. 150N"],"hint":"","explain":"<span class='basic_left'>Ta c\u00f3 1kg = 1000g. V\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 10N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2383},{"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 ng\u01b0\u1eddi c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 350N th\u00ec c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng b\u1eb1ng bao nhi\u00eau?","select":["A. 350g ","B. 35kg ","C. 3500kg","D. 35g"],"hint":"","explain":"<span class='basic_left'> Ta c\u00f3 1kg = 1000g. V\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 10N <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2384},{"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":"Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a s\u1eaft v\u00e0o kho\u1ea3ng $ 7,8g\/c{{m}^{3}}$ . Do \u0111\u00f3, $3d{{m}^{3}}$ s\u1eaft s\u1ebd c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng kho\u1ea3ng:","select":["A. 234 N","B. 23,4 N","C. 2,34 N","D. 0,234 N"],"hint":"","explain":"<span class='basic_left'> \u0110\u1ed5i $1d{{m}^{3}} = 1000c{{m}^{3}}$.<br\/> N\u00ean $3d{{m}^{3}} = 3000c{{m}^{3}}$.<br\/>V\u1eady kh\u1ed1i l\u01b0\u1ee3ng s\u1eaft l\u00e0: $m = V \\times D = 3000 \\times 7,8 = 23400g=23,4$ kg.<br\/>Tr\u1ecdng l\u01b0\u1ee3ng s\u1eaft l\u00e0: $P = 10m = 234N$<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2385},{"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":"Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a g\u1ea1o v\u00e0o kho\u1ea3ng 1200 kg\/${{m}^{3}}$. G\u1ea1o c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 3kg s\u1ebd c\u00f3 th\u1ec3 t\u00edch l\u00e0.","select":["A. 2,5 $c{{m}^{3}}$ ","B. 2,5 ${{m}^{3}}$","C. 2,5 $d{{m}^{3}}$ ","D. 2,5 m${{m}^{3}}$"],"hint":"","explain":"<span class='basic_left'> Th\u1ec3 t\u00edch V = m\/D. \u0110\u1ed5i 1${{m}^{3}}$ = 1000$d{{m}^{3}}$ .<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2386},{"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":"Bi\u1ebft kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a x\u0103ng l\u00e0 700 kg\/${{m}^{3}}$. M\u1ed9t chi\u1ebfc can nh\u1ef1a c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 2 kg \u0111\u1ef1ng 20 l\u00edt x\u0103ng c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng b\u1eb1ng:","select":["A. 1,2N","B. 120N","C. 1,6N","D. 160N"],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed5i 1${{m}^{3}}$ = 1000$d{{m}^{3}}$ = 1000 l\u00edt. Kh\u1ed1i l\u01b0\u1ee3ng m = V.D <br\/> v\u1eady kh\u1ed1i l\u01b0\u1ee3ng x\u0103ng l\u00e0 14kg, t\u1ed5ng c\u1ea3 can l\u00e0 16kg = 160N.<br\/><span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2387},{"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":"Khi s\u1eed d\u1ee5ng l\u1ef1c k\u1ebf \u0111\u1ec3 \u0111o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt, kim tr\u00ean l\u1ef1c k\u1ebf ch\u1ec9 5,4N. Khi \u0111\u00f3 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt n\u1eb7ng l\u00e0:","select":["A. 5,4 kg","B. 54kg","C. 0,54kg","D. 0,054kg"],"hint":"","explain":"<span class='basic_left'>Ta c\u00f3: v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 10N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2388},{"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":"Ta treo m\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 0,32 kg v\u00e0o l\u1ef1c k\u1ebf. Khi \u0111\u00f3 kim tr\u00ean l\u1ef1c k\u1ebf ch\u1ec9 l\u00e0:","select":["A. 3,2 N","B. 32N","C. 0,32N","D. 320N"],"hint":"","explain":"<span class='basic_left'>V\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 10N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2389},{"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":"Khi treo m\u1ed9t c\u00e1i chai \u0111\u1ef1ng 2 l\u00edt n\u01b0\u1edbc v\u00e0o m\u1ed9t l\u1ef1c k\u1ebf khi \u0111\u00f3 kim c\u1ee7a l\u1ef1c k\u1ebf ch\u1ec9 25N, bi\u1ebft kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a n\u01b0\u1edbc l\u00e0 1000kg\/${{m}^{3}}$. Khi treo chai kh\u00f4ng \u0111\u1ef1ng n\u01b0\u1edbc v\u00e0o l\u1ef1c k\u1ebf khi \u0111\u00f3 kim tr\u00ean l\u1ef1c k\u1ebf ch\u1ec9 l\u00e0:","select":["A. 5N","B. 50N","C. 0,5N","D. 500N"],"hint":"","explain":"<span class='basic_left'>Kh\u1ed1i l\u01b0\u1ee3ng n\u01b0\u1edbc l\u00e0 : 2kg, n\u00ean tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a n\u01b0\u1edbc l\u00e0 20N.<br\/>v\u1eady khi treo chai kh\u00f4ng \u0111\u1ef1ng n\u01b0\u1edbc v\u00e0o l\u1ef1c k\u1ebf khi \u0111\u00f3 kim tr\u00ean l\u1ef1c k\u1ebf ch\u1ec9 l\u00e0: 25-20 = 5N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2390}],"lesson":{"save":0,"level":2}}