问题描述：
{"title":"\u5982\u56fe\u6240\u793a\uff0c\u7528\u5929\u5e73\u6d4b\u91cf\u7a7a\u74f6\u8d28\u91cf\u540e\uff0c\u518d\u5c06\u5b83\u88c5\u6ee1\u9171\u6cb9\uff0c\u7531\u56fe\u4e59\u53ef\u77e5\uff0c\u88c5\u6ee1\u9171\u6cb9\u7684\u74f6\u5b50\u7684\u603b\u8d28\u91cf\u4e3a___g\uff0c\u7a7a\u74f6\u5bb9\u79ef\u4e3a30cm3\uff0c\u9171\u6cb9\u5bc6\u5ea6\u4e3a___g\/m3\uff0e
" "latex":{"title":"\u5982\u56fe\u6240\u793a\uff0c\u7528\u5929\u5e73\u6d4b\u91cf\u7a7a\u74f6\u8d28\u91cf\u540e\uff0c\u518d\u5c06\u5b83\u88c5\u6ee1\u9171\u6cb9\uff0c\u7531\u56fe\u4e59\u53ef\u77e5\uff0c\u88c5\u6ee1\u9171\u6cb9\u7684\u74f6\u5b50\u7684\u603b\u8d28\u91cf\u4e3a___g\uff0c\u7a7a\u74f6\u5bb9\u79ef\u4e3a30cm3\uff0c\u9171\u6cb9\u5bc6\u5ea6\u4e3a___g\/m3\uff0e"}}
物理作业帮用户2017-11-08
用这款APP，检查作业高效又准确！
最佳答案： {"title":"
\uff081\uff09\u9171\u6cb9\u548c\u74f6\u5b50\u7684\u603b\u8d28\u91cf\u4e3am2=20g+20g+5g+2g=47g\uff0c
\uff082\uff09\u9171\u6cb9\u7684\u8d28\u91cf\u4e3am=m2-m1=47g-14g=33g\uff0c
\u9171\u6cb9\u7684\u5bc6\u5ea6
\uff0e
\u6545\u7b54\u6848\u4e3a\uff1a47\uff1b1.1\uff0e" "latex":"
\uff081\uff09\u9171\u6cb9\u548c\u74f6\u5b50\u7684\u603b\u8d28\u91cf\u4e3am2=20g+20g+5g+2g=47g\uff0c
\uff082\uff09\u9171\u6cb9\u7684\u8d28\u91cf\u4e3am=m2-m1=47g-14g=33g\uff0c
\u9171\u6cb9\u7684\u5bc6\u5ea6${\\rho }_{\u9171\u6cb9}=\\frac {m} {v}=\\frac {33g} {30{cm}^{3}}=1.1g\/{cm}^{3}$\uff0e
\u6545\u7b54\u6848\u4e3a\uff1a47\uff1b1.1\uff0e"}
