\u5bc6\u5ea6\u662f\u7269\u8d28\u7684\u4e00\u79cd\u7279\u6027\uff0c\u53ea\u8981\u6d4b\u51fa\u7269\u4f53\u7684\u4f53\u79ef\u548c\u8d28\u91cf\u5c31\u53ef\u4ee5\u7b97\u51fa\u7269\u8d28\u7684\u5bc6\u5ea6\u6d4b\u91cf\u7269\u4f53\u5bc6\u5ea6\uff0c\u8fd9\u662f\u521d\u4e2d\u7269\u7406\u6700\u91cd\u8981\u7684\u5b9e\u9a8c\u4e4b\u4e00\u3002\u90a3\u4e48\u5728\u5177\u4f53\u7684\u7269\u7406\u4e60\u9898\u4e2d\uff0c\u7269\u4f53\u7684\u5bc6\u5ea6\u8be5\u600e\u4e48\u7b97\u5462\uff1f<\/p>\n
\u7269\u4f53\u7684\u5bc6\u5ea6\u600e\u4e48\u7b97<\/p>\n
1\u3001\u5b9a\u4e49<\/p>\n
\u5728\u7269\u7406\u5b66\u4e2d\uff0c\u628a\u67d0\u79cd\u7269\u8d28\u5355\u4f4d\u4f53\u79ef\u7684\u8d28\u91cf\u53eb\u505a\u8fd9\u79cd\u7269\u8d28\u7684\u5bc6\u5ea6\u3002<\/p>\n
2\u3001\u516c\u5f0f<\/p>\n
\u03c1=m\/V \uff08\u03c1\u8868\u793a\u5bc6\u5ea6\u3001m\u8868\u793a\u8d28\u91cf\u3001 V\u8868\u793a\u4f53\u79ef\uff09<\/p>\n
3\u3001\u5355\u4f4d<\/p>\n
Kg\/m^3<\/p>\n
g\/cm^3<\/p>\n
t\/m^3<\/p>\n
kg\/dm^3<\/p>\n
g\/cm^3<\/p>\n
4\u3001\u5355\u4f4d\u6362\u7b97<\/p>\n
1g\/cm^3 = 10^3kg\/m^3<\/p>\n
1kg\/m^3 = 10^-3 g\/cm^3<\/p>\n
\u7269\u4f53\u7684\u5bc6\u5ea6\u662f\u56fa\u5b9a\u7684\u5417<\/p>\n
\u7269\u4f53\u7684\u5bc6\u5ea6\u5e76\u4e0d\u662f\u6052\u5b9a\u4e0d\u53d8\u7684\uff0c\u5f71\u54cd\u5bc6\u5ea6\u5927\u5c0f\u7684\u56e0\u7d20\u6709\u6e29\u5ea6\u3001\u72b6\u6001\u7b49\u3002<\/p>\n
\u5927\u90e8\u5206\u7269\u4f53\u90fd\u5177\u6709\u70ed\u80c0\u51b7\u7f29\u7684\u6027\u8d28\uff0c\u4e00\u5b9a\u8d28\u91cf\u7684\u7269\u4f53\uff0c\u6e29\u5ea6\u5347\u9ad8\uff0c\u4f53\u79ef\u589e\u5927\uff0c\u7531\u516c\u5f0f\u03c1=mv\u77e5\uff0c\u5bc6\u5ea6\u51cf\u5c0f\u3002<\/p>\n
\u540c\u4e00\u79cd\u7269\u8d28\u72b6\u6001\u4e0d\u540c\uff0c\u5bc6\u5ea6\u4e0d\u540c\uff0c\u4f8b\u5982\u6c34\u548c\u51b0\uff0c\u662f\u540c\u4e00\u79cd\u7269\u8d28\uff0c\u4f46\u662f\u6c34\u53d8\u6210\u51b0\u4f53\u79ef\u589e\u5927\uff0c\u800c\u5bc6\u5ea6\u53d8\u5c0f\u4e86\u3002<\/p>\n
\u7269\u4f53\u7684\u5bc6\u5ea6\u4e0d\u53d7\u4ec0\u4e48\u7684\u5f71\u54cd<\/p>\n
\u5bc6\u5ea6\u662f\u7269\u8d28\u7684\u4e00\u79cd\u91cd\u8981\u5c5e\u6027\uff0c\u5b83\u8868\u793a\u5355\u4f4d\u4f53\u79ef\u5185\u7269\u8d28\u7684\u8d28\u91cf\u3002\u6839\u636e\u5bc6\u5ea6\u7684\u5b9a\u4e49\uff0c\u5176\u5927\u5c0f\u662f\u7531\u7269\u8d28\u7684\u7ec4\u6210\u548c\u7ed3\u6784\u51b3\u5b9a\u7684\uff0c\u4e0e\u7269\u8d28\u7684\u8d28\u91cf\u548c\u4f53\u79ef\u65e0\u5173\u3002<\/p>\n
\u5728\u6807\u51c6\u72b6\u6001\u4e0b\uff0c\u4e00\u4e9b\u7269\u8d28\u7684\u5bc6\u5ea6\u662f\u6052\u5b9a\u7684\uff0c\u4e0d\u4f1a\u56e0\u4e3a\u5916\u754c\u6761\u4ef6\u7684\u53d8\u5316\u800c\u6539\u53d8\u3002\u4f8b\u5982\uff0c\u7eaf\u6c34\u5728\u6807\u51c6\u6e29\u5ea6\u548c\u538b\u529b\u4e0b\u7684\u5bc6\u5ea6\u4e3a1\u5343\u514b\u6bcf\u5347\uff0c\u65e0\u8bba\u5176\u8d28\u91cf\u6216\u4f53\u79ef\u5982\u4f55\u53d8\u5316\uff0c\u5176\u5bc6\u5ea6\u59cb\u7ec8\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n
\u53e6\u5916\uff0c\u4e00\u4e9b\u91d1\u5c5e\u5143\u7d20\uff0c\u5982\u94dc\u3001\u94c1\u3001\u91d1\u7b49\uff0c\u5176\u5bc6\u5ea6\u4e5f\u662f\u975e\u5e38\u7a33\u5b9a\u7684\uff0c\u51e0\u4e4e\u4e0d\u53d7\u6e29\u5ea6\u3001\u538b\u529b\u7b49\u5916\u754c\u6761\u4ef6\u7684\u5f71\u54cd\u3002<\/p>\n
\u56e0\u6b64\uff0c\u53ef\u4ee5\u8bf4\uff0c\u5728\u4e00\u5b9a\u7684\u6761\u4ef6\u4e0b\uff0c\u4e00\u4e9b\u7269\u8d28\u7684\u5bc6\u5ea6\u662f\u6052\u5b9a\u7684\uff0c\u4e0d\u968f\u8d28\u91cf\u548c\u4f53\u79ef\u7684\u53d8\u5316\u800c\u6539\u53d8\u3002<\/p>\n
\u6c42\u7269\u4f53\u7684\u5bc6\u5ea6\u7684\u7ec3\u4e60\u9898<\/p>\n
1\u3001\u4e00\u4e2a\u5bb9\u79efV0=500cm3\u3001\u8d28\u91cfm=0.5kg\u7684\u74f6\u5b50\u91cc\u88c5\u6709\u6c34\uff0c\u4e4c\u9e26\u4e3a\u4e86\u559d\u5230\u74f6\u5b50\u91cc\u7684\u6c34\uff0c\u5c31\u8854\u4e86\u5f88\u591a\u7684\u5c0f\u77f3\u5757\u586b\u5230\u74f6\u5b50\u91cc\uff0c\u8ba9\u6c34\u9762\u4e0a\u5347\u5230\u74f6\u53e3\u3002\u82e5\u74f6\u5185\u6709\u8d28\u91cfm=0.4kg\u7684\u6c34\u3002\u6c42\uff1a\uff08\u6c34\u7684\u5bc6\u5ea6\u03c1\u6c34=1.0\u00d7103kg\/m3\uff0c\u77f3\u5757\u5bc6\u5ea6\u03c1\u77f3\u5757=2.6\u00d7103kg\/m3\uff09<\/p>\n
\uff081\uff09\u74f6\u4e2d\u6c34\u7684\u4f53\u79efV1\uff1b<\/p>\n
\uff082\uff09\u4e4c\u9e26\u6295\u5165\u74f6\u5b50\u4e2d\u7684\u77f3\u5757\u7684\u4f53\u79efV2\uff1b<\/p>\n
\uff083\uff09\u4e4c\u9e26\u6295\u5165\u77f3\u5757\u540e\uff0c\u74f6\u5b50\u3001\u77f3\u5757\u548c\u6c34\u7684\u603b\u8d28\u91cfm\u3002<\/p>\n
\u89e3\uff1a\uff081\uff09\u7531\u03c1=\u5f97\u74f6\u5185\u6c34\u7684\u4f53\u79ef\uff1a<\/p>\n
V1==4\u00d710-4m3=400cm3\uff1b<\/p>\n
\u7b54\uff1a\u74f6\u4e2d\u6c34\u7684\u4f53\u79ef\u4e3a400cm3\uff1b<\/p>\n
\uff082\uff09\u77f3\u5757\u603b\u4f53\u79ef\uff1a<\/p>\n
V2=V-V1=500cm3-400cm3=100cm3\uff1b<\/p>\n
\u7b54\uff1a\u4e4c\u9e26\u6295\u5165\u74f6\u5b50\u4e2d\u7684\u77f3\u5757\u7684\u4f53\u79ef\u4e3a100cm3\uff1b<\/p>\n
\uff083\uff09\u7531\u03c1=\u5f97\u77f3\u5757\u7684\u8d28\u91cf\uff1a<\/p>\n
m\u77f3=\u03c1\u77f3V2=2.6g\/cm3\u00d7100cm3=260g=0.26kg\uff0c<\/p>\n
\u4e4c\u9e26\u6295\u5165\u77f3\u5757\u540e\uff0c\u74f6\u5b50\u3001\u77f3\u5757\u548c\u6c34\u7684\u603b\u8d28\u91cf\uff1a<\/p>\n
m=m\u6c34+m\u74f6+m\u77f3=0.4kg+0.5kg+0.26kg=1.16kg=1160g\u3002<\/p>\n
\u7b54\uff1a\u4e4c\u9e26\u6295\u5165\u77f3\u5757\u540e\uff0c\u74f6\u5b50\u3001\u77f3\u5757\u548c\u6c34\u7684\u603b\u8d28\u91cf\u4e3a1160g\u3002<\/p>\n
2\u3001\u6709\u4e00\u53ea\u73bb\u7483\u74f6\uff0c\u5b83\u7684\u8d28\u91cf\u4e3a0.1kg\uff0c\u5f53\u74f6\u5185\u88c5\u6ee1\u6c34\u65f6\uff0c\u74f6\u548c\u6c34\u7684\u603b\u8d28\u91cf\u4e3a0.4kg.\u5728\u6b64\u7a7a\u73bb\u7483\u74f6\u4e2d\u88c5\u5165\u4e00\u4e9b\u5408\u91d1\u6eda\u73e0\uff0c\u74f6\u548c\u5408\u91d1\u6eda\u73e0\u7684\u603b\u8d28\u91cf\u4e3a0.8kg\uff0c\u6b64\u65f6\u518d\u5f80\u74f6\u4e2d\u704c\u5165\u6c34\u5230\u74f6\u53e3\u6b62\uff0c\u74f6\u3001\u5408\u91d1\u6eda\u73e0\u548c\u6c34\u7684\u603b\u8d28\u91cf\u4e3a0.9kg\uff0cg=10N\/kg\uff0c\u6c42\uff1a<\/p>\n
\uff081\uff09\u73bb\u7483\u74f6\u7684\u5bb9\u79ef\uff1b<\/p>\n
\uff082\uff09\u5408\u91d1\u6eda\u73e0\u7684\u603b\u8d28\u91cf\uff1b<\/p>\n
\uff083\uff09\u5408\u91d1\u6eda\u73e0\u7684\u5bc6\u5ea6\u3002<\/p>\n
\u89e3\uff1a\uff081\uff09\u73bb\u7483\u74f6\u88c5\u6ee1\u6c34\uff1a<\/p>\n
m\u6c34=0.4kg-0.1kg=0.3kg=300g\uff0c<\/p>\n
\u73bb\u7483\u74f6\u5bb9\u79ef\uff1a<\/p>\n
V=V\u6c34===300cm3\uff0c<\/p>\n
\u7b54\uff1a\u73bb\u7483\u74f6\u7684\u5bb9\u79ef\u4e3a300cm3\uff1b<\/p>\n
\uff082\uff09\u5408\u91d1\u6eda\u73e0\u7684\u8d28\u91cf\uff1a<\/p>\n
m\u5408\u91d1=m\u603b-m\u74f6<\/p>\n
=0.8kg-0.1kg=0.7kg=700g\uff0c<\/p>\n
\u7b54\uff1a\u5408\u91d1\u6eda\u73e0\u7684\u603b\u8d28\u91cf\u4e3a700g\uff1b<\/p>\n
\uff083\uff09\u74f6\u4e2d\u88c5\u4e86\u5408\u91d1\u6eda\u73e0\u540e\u518d\u88c5\u6ee1\u6c34\uff0c\u6c34\u7684\u4f53\u79ef\uff1a<\/p>\n
V\u6c34\u2032==100cm3\uff0c<\/p>\n
\u5408\u91d1\u6eda\u73e0\u7684\u4f53\u79ef\uff1a<\/p>\n
V\u5408\u91d1=V-V\u6c34\uff1f=300cm3-100cm3=200cm3\uff0c<\/p>\n
\u5408\u91d1\u6eda\u73e0\u7684\u5bc6\u5ea6\uff1a<\/p>\n
\u03c1===3.5g\/cm3\u3002<\/p>\n
\u7b54\uff1a\u5408\u91d1\u6eda\u73e0\u7684\u5bc6\u5ea6\u4e3a3.5g\/cm3\u3002<\/p>\n
3\u3001\u67d0\u7a7a\u74f6\u7684\u8d28\u91cf\u4e3a0.1\u5343\u514b\uff0c\u5728\u74f6\u5185\u88c5\u6ee1\u6c34\uff0c\u6d4b\u5f97\u74f6\u548c\u6c34\u7684\u603b\u8d28\u91cf0.7\u5343\u514b\uff0c\u5c06\u8d28\u91cf\u4e3a0.5\u5343\u514b\u7684\u91d1\u5c5e\u5757\u6d78\u6ca1\u5728\u74f6\u5185\u6c34\u4e2d\uff0c\u7b49\u505c\u6b62\u6ea2\u6c34\u540e\u518d\u6b21\u6d4b\u5f97\u74f6\u3001\u91d1\u5c5e\u5757\u548c\u5269\u4f59\u6c34\u7684\u603b\u8d28\u91cf1.1\u5343\u514b\u3002\u6c42\uff1a<\/p>\n
\uff081\uff09\u74f6\u7684\u5bb9\u79efV\u5bb9\u3002<\/p>\n
\uff082\uff09\u6ea2\u51fa\u6c34\u7684\u8d28\u91cfm\u6ea2\u3002<\/p>\n
\uff083\uff09\u91d1\u5c5e\u5757\u7684\u5bc6\u5ea6\u03c1\u91d1\u5c5e\u3002<\/p>\n
\u89e3\uff1a\uff081\uff09\u74f6\u5b50\u4e2d\u88c5\u6ee1\u6c34\u540e\u6c34\u7684\u8d28\u91cf\uff1am\u6c34=0.7kg-0.1kg=0.6kg=600g\uff0c<\/p>\n
\u7531\u03c1=\u53ef\u5f97\u7a7a\u74f6\u5bb9\u79ef\uff1a<\/p>\n
V=V\u6c34===600cm3\uff1b<\/p>\n
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\uff083\uff09\u91d1\u5c5e\u5757\u7684\u4f53\u79ef\uff1a<\/p>\n
V\u91d1=V\u6ea2===100cm3\uff0c<\/p>\n
\u91d1\u5c5e\u5757\u7684\u8d28\u91cf\uff1am\u91d1=0.5kg=500g\uff0c<\/p>\n
\u91d1\u5c5e\u5757\u7684\u5bc6\u5ea6\uff1a<\/p>\n
\u03c1===5g\/cm3=5\u00d7103kg\/m3\u3002<\/p>\n
\u7b54\uff1a\uff081\uff09\u74f6\u7684\u5bb9\u79ef\u4e3a600cm3\uff1b<\/p>\n
\uff082\uff09\u6ea2\u51fa\u7684\u6c34\u7684\u8d28\u91cf\u4e3a100g\uff1b<\/p>\n
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