{"common":{"save":0,"post_id":"8862","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8383","mon_id":"1158790","chapter_id":"1159899","post_id":"8862","question":"<p>Ch\u1ecdn phát bi\u1ec3u <strong>\u0111úng<\/strong>.<\/p>","options":["<strong>A.<\/strong> Áp su\u1ea5t n\u01b0\u1edbc \u1edf \u0111áy bình ch\u1ee9a ch\u1ec9 ph\u1ee5 thu\u1ed9c vào di\u1ec7n tích m\u1eb7t \u0111áy.","<strong>B.<\/strong> Áp su\u1ea5t ch\u1ea5t l\u1ecfng ph\u1ee5 thu\u1ed9c vào hình d\u1ea1ng và kích th\u01b0\u1edbc c\u1ee7a bình ch\u1ee9a.","<strong>C.<\/strong> Áp su\u1ea5t ch\u1ea5t l\u1ecfng t\u1ea1i m\u1ed9t \u0111i\u1ec3m b\u1ea5t kì trong ch\u1ea5t l\u1ecfng có tác d\u1ee5ng nh\u01b0 nhau theo m\u1ecdi h\u01b0\u1edbng.","<strong>D.<\/strong> T\u1ea1i m\u1ed9t \u0111i\u1ec3m b\u1ea5t kì trong ch\u1ea5t l\u1ecfng, áp su\u1ea5t ch\u1ea5t l\u1ecfng có chi\u1ec1u h\u01b0\u1edbng xu\u1ed1ng."],"correct":"3","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> Áp su\u1ea5t ch\u1ea5t l\u1ecfng t\u1ea1i m\u1ed9t \u0111i\u1ec3m b\u1ea5t kì trong ch\u1ea5t l\u1ecfng có tác d\u1ee5ng nh\u01b0 nhau theo m\u1ecdi h\u01b0\u1edbng.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-16 09:09:00","option_type":"txt","len":3},{"id":"8385","mon_id":"1158790","chapter_id":"1159899","post_id":"8862","question":"<p>Trong các cách t\u0103ng, gi\u1ea3m áp su\u1ea5t sau \u0111ây, cách nào <strong>không \u0111úng<\/strong>?<\/p>","options":["<strong>A.<\/strong> Mu\u1ed1n t\u0103ng áp su\u1ea5t thì t\u0103ng áp l\u1ef1c, gi\u1ea3m di\u1ec7n tích b\u1ecb ép.","<strong>B.<\/strong> Mu\u1ed1n t\u0103ng áp su\u1ea5t thì gi\u1ea3m áp l\u1ef1c, t\u0103ng di\u1ec7n tích b\u1ecb ép.","<strong>C.<\/strong> Mu\u1ed1n gi\u1ea3m áp su\u1ea5t thì ph\u1ea3i gi\u1ea3m áp l\u1ef1c, gi\u1eef nguyên di\u1ec7n tích b\u1ecb ép.","<strong>D.<\/strong> Mu\u1ed1n gi\u1ea3m áp su\u1ea5t thì ph\u1ea3i gi\u1eef nguyên áp l\u1ef1c, t\u0103ng di\u1ec7n tích b\u1ecb ép."],"correct":"2","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> Mu\u1ed1n t\u0103ng áp su\u1ea5t thì gi\u1ea3m áp l\u1ef1c, t\u0103ng di\u1ec7n tích b\u1ecb ép.<\/span><\/p><p>Ta có <span class=\"math-tex\">$p=\\dfrac{F_N}{S}$<\/span> do \u0111ó <\/p><p>A, C, D – \u0111úng.<\/p><p>B – sai, mu\u1ed1n t\u0103ng áp su\u1ea5t thì t\u0103ng áp l\u1ef1c, gi\u1ea3m di\u1ec7n tích b\u1ecb ép.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-16 09:10:36","option_type":"txt","len":3},{"id":"8387","mon_id":"1158790","chapter_id":"1159899","post_id":"8862","question":"<p>M\u1ed9t áp l\u1ef1c 600 N gây áp su\u1ea5t 3000 N\/m² lên di\u1ec7n tích b\u1ecb ép có \u0111\u1ed9 l\u1edbn<\/p>","options":["<strong>A.<\/strong> 2000 cm².","<strong>B.<\/strong> 200 cm².","<strong>C.<\/strong> 20 cm².","<strong>D.<\/strong> 0,2 cm²."],"correct":"1","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 2000 cm².<\/span><\/p><p>Ta có <span class=\"math-tex\">$p=\\dfrac{F_N}{S}$<\/span> suy ra <span class=\"math-tex\">$S=\\dfrac{F_N}{p}=\\dfrac{600}{3000}=0,2(m^2)=2000(cm^2)$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-16 09:12:28","option_type":"txt","len":2}]}
