{"common":{"save":0,"post_id":"9270","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9897","post_id":"9270","mon_id":"1159539","chapter_id":"1160023","question":"<p>M\u1ed9t qu\u1ea3 c\u1ea7u kim lo\u1ea1i \u0111\u01b0\u1ee3c nung nóng và không th\u1ec3 chui qua vòng kim lo\u1ea1i ban \u0111\u1ea7u v\u1eeba khít. Gi\u1ea3i thích \u0111úng là:<\/p>","options":["A. Kim lo\u1ea1i m\u1ec1m \u0111i","B. Qu\u1ea3 c\u1ea7u nh\u1eb9 h\u01a1n","C. Qu\u1ea3 c\u1ea7u \u0111ã n\u1edf ra vì nhi\u1ec7t","D. Vòng kim lo\u1ea1i b\u1ecb co l\u1ea1i"],"correct":"3","level":"2","hint":"<p>Nhi\u1ec7t làm t\u0103ng kích th\u01b0\u1edbc v\u1eadt.<\/p>","answer":"<p><strong data-end=\"2505\" data-start=\"2457\">\u0110áp án \u0111úng là: C. Qu\u1ea3 c\u1ea7u \u0111ã n\u1edf ra vì nhi\u1ec7t<\/strong><br data-end=\"2508\" data-start=\"2505\" \/><strong data-end=\"2523\" data-start=\"2508\">Gi\u1ea3i thích:<\/strong><\/p><p>Khi nóng lên, qu\u1ea3 c\u1ea7u kim lo\u1ea1i n\u1edf ra → không còn v\u1eeba v\u1edbi vòng n\u1eefa.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"0","date":"2025-05-16 06:20:26","option_type":"txt","len":2},{"id":"9898","post_id":"9270","mon_id":"1159539","chapter_id":"1160023","question":"<p>Khi tr\u1eddi l\u1ea1nh, các t\u1ea5m kim lo\u1ea1i l\u1ee3p mái nhà th\u01b0\u1eddng phát ra ti\u1ebfng "kêu lách tách" là do:<\/p>","options":["A. M\u01b0a \u0111á r\u01a1i xu\u1ed1ng","B. Chim \u0111\u1eadu trên mái","C. Kim lo\u1ea1i co l\u1ea1i khi b\u1ecb l\u1ea1nh \u0111\u1ed9t ng\u1ed9t","D. S\u1ef1 thay \u0111\u1ed5i áp su\u1ea5t không khí"],"correct":"3","level":"2","hint":"<p>Liên h\u1ec7 hi\u1ec7n t\u01b0\u1ee3ng co – n\u1edf vì nhi\u1ec7t.<\/p>","answer":"<p><strong data-end=\"2930\" data-start=\"2871\">\u0110áp án \u0111úng là: C. Kim lo\u1ea1i co l\u1ea1i khi b\u1ecb l\u1ea1nh \u0111\u1ed9t ng\u1ed9t<\/strong><br data-end=\"2933\" data-start=\"2930\" \/><strong data-end=\"2948\" data-start=\"2933\">Gi\u1ea3i thích:<\/strong><\/p><p>S\u1ef1 co nhanh c\u1ee7a kim lo\u1ea1i gây ra ti\u1ebfng kêu do bi\u1ebfn d\u1ea1ng \u0111\u1ed9t ng\u1ed9t.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"0","date":"2025-05-16 06:21:20","option_type":"txt","len":3},{"id":"9899","post_id":"9270","mon_id":"1159539","chapter_id":"1160023","question":"<p>N\u1ebfu m\u1ed9t \u1ed1ng th\u1ee7y tinh \u0111\u01b0\u1ee3c \u0111\u1ed5 \u0111\u1ea7y ch\u1ea5t l\u1ecfng và nung nóng, ch\u1ea5t l\u1ecfng s\u1ebd dâng lên. Nguyên nhân là:<\/p>","options":["A. Ch\u1ea5t l\u1ecfng n\u1edf ra vì nhi\u1ec7t","B. Tr\u1ecdng l\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng t\u0103ng","C. \u1ed0ng th\u1ee7y tinh b\u1ecb rút ng\u1eafn","D. Khí trong \u1ed1ng b\u1ecb \u0111\u1ea9y ra ngoài"],"correct":"1","level":"2","hint":"<p>So sánh th\u1ec3 tích ch\u1ea5t l\u1ecfng khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng.<\/p>","answer":"<p><strong data-end=\"3365\" data-start=\"3318\">\u0110áp án \u0111úng là: A. Ch\u1ea5t l\u1ecfng n\u1edf ra vì nhi\u1ec7t<\/strong><br data-end=\"3368\" data-start=\"3365\" \/><strong data-end=\"3383\" data-start=\"3368\">Gi\u1ea3i thích:<\/strong><\/p><p>Nhi\u1ec7t \u0111\u1ed9 t\u0103ng làm ch\u1ea5t l\u1ecfng n\u1edf ra → dâng lên trong \u1ed1ng.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"0","date":"2025-05-16 06:22:10","option_type":"txt","len":2}]}
