{"common":{"save":0,"post_id":"8446","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7200","post_id":"8446","mon_id":"1159539","chapter_id":"1159710","question":"<p>\u0110\u1ec3 xác \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng riêng c\u1ee7a m\u1ed9t ch\u1ea5t, ta c\u1ea7n \u0111o nh\u1eefng \u0111\u1ea1i l\u01b0\u1ee3ng nào?<\/p>","options":["A. Kh\u1ed1i l\u01b0\u1ee3ng và th\u1ec3 tích","B. Kh\u1ed1i l\u01b0\u1ee3ng và chi\u1ec1u dài","C. Th\u1ec3 tích và chi\u1ec1u r\u1ed9ng","D. Th\u1ec3 tích và di\u1ec7n tích"],"correct":"1","level":"1","hint":"<p>- Công th\u1ee9c tính kh\u1ed1i l\u01b0\u1ee3ng riêng: <span class=\"math-tex\">$D = \\frac{m}{V}$<\/span><\/p><p>- Kh\u1ed1i l\u01b0\u1ee3ng ký hi\u1ec7u là <span class=\"math-tex\">$m$<\/span>, th\u1ec3 tích ký hi\u1ec7u là <span class=\"math-tex\">$V$<\/span>.<\/p>","answer":"<p><strong data-end=\"574\" data-start=\"555\">\u0110áp án \u0111úng là:<\/strong> <strong data-end=\"604\" data-start=\"575\">A. Kh\u1ed1i l\u01b0\u1ee3ng và th\u1ec3 tích<\/strong><\/p><p><strong data-end=\"625\" data-start=\"610\">Gi\u1ea3i thích:<\/strong> Vì kh\u1ed1i l\u01b0\u1ee3ng riêng \u0111\u01b0\u1ee3c xác \u0111\u1ecbnh theo công th\u1ee9c <span class=\"math-tex\">$D = \\frac{m}{V}$<\/span>\u200b, nên c\u1ea7n \u0111o kh\u1ed1i l\u01b0\u1ee3ng và th\u1ec3 tích.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2025-02-13 10:26:00","option_type":"txt","len":2},{"id":"7201","post_id":"8446","mon_id":"1159539","chapter_id":"1159710","question":"<p>D\u1ee5ng c\u1ee5 nào sau \u0111ây dùng \u0111\u1ec3 \u0111o kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt r\u1eafn trong thí nghi\u1ec7m xác \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng riêng?<\/p>","options":["A. Th\u01b0\u1edbc \u0111o \u0111\u1ed9 dài","B. Bình chia \u0111\u1ed9","C. Cân \u0111i\u1ec7n t\u1eed ho\u1eb7c cân \u0111\u1ed3ng h\u1ed3","D. L\u1ef1c k\u1ebf"],"correct":"3","level":"1","hint":"<p>D\u1ee5ng c\u1ee5 \u0111o kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u1eddng g\u1eb7p trong phòng thí nghi\u1ec7m.<\/p>","answer":"<p>\u0110áp án \u0111úng là: C. Cân \u0111i\u1ec7n t\u1eed ho\u1eb7c cân \u0111\u1ed3ng h\u1ed3<\/p><p><strong data-end=\"1116\" data-start=\"1101\">Gi\u1ea3i thích:<\/strong> Cân là d\u1ee5ng c\u1ee5 \u0111o kh\u1ed1i l\u01b0\u1ee3ng, còn bình chia \u0111\u1ed9 dùng \u0111\u1ec3 \u0111o th\u1ec3 tích.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2025-02-13 10:28:03","option_type":"txt","len":2},{"id":"7202","post_id":"8446","mon_id":"1159539","chapter_id":"1159710","question":"<p>\u0110\u1ec3 \u0111o th\u1ec3 tích c\u1ee7a m\u1ed9t v\u1eadt r\u1eafn không th\u1ea5m n\u01b0\u1edbc và có hình d\u1ea1ng b\u1ea5t k\u1ef3, ta có th\u1ec3 s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 nào sau \u0111ây?<br \/> <\/p>","options":["A. Cân \u0111\u1ed3ng h\u1ed3<br \/>\n<br \/>\n<br \/>\n<br \/>\n ","B. Th\u01b0\u1edbc \u0111o \u0111\u1ed9 dài","C. Bình chia \u0111\u1ed9 có ch\u1ee9a n\u01b0\u1edbc","D. Nhi\u1ec7t k\u1ebf"],"correct":"3","level":"1","hint":"<p>Dùng nguyên t\u1eafc n\u01b0\u1edbc dâng \u0111\u1ec3 \u0111o th\u1ec3 tích c\u1ee7a v\u1eadt r\u1eafn không có hình d\u1ea1ng xác \u0111\u1ecbnh.<\/p>","answer":"<p>\u0110áp án \u0111úng là: C. Bình chia \u0111\u1ed9 có ch\u1ee9a n\u01b0\u1edbc<\/p><p>Gi\u1ea3i thích:<\/p><p>Khi th\u1ea3 v\u1eadt vào bình chia \u0111\u1ed9 ch\u1ee9a n\u01b0\u1edbc, th\u1ec3 tích n\u01b0\u1edbc dâng lên chính là th\u1ec3 tích c\u1ee7a v\u1eadt.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2025-02-13 10:29:59","option_type":"txt","len":2}]}