初二物理密度题 初二物理密度题及答案，越多越好
\u6025\u970012\u9053\u521d\u4e8c\u7269\u7406\u5bc6\u5ea6\u8ba1\u7b97\u9898\u548c8\u9053\u901f\u5ea6\u8ba1\u7b97\u9898\uff08\u6709\u7b54\u6848\u7684\uff09\u671f\u672b\u7269\u7406\u590d\u4e60\uff08\u5bc6\u5ea6\u8ba1\u7b97\u9898\uff09
\u8d28\u91cf\u4e3a9\u5343\u514b\u7684\u51b0\u5757\uff0c\u5bc6\u5ea6\u4e3a0.9\u00d7103\u5343\u514b\uff0f\u7c733\uff0e\u6c42\u51b0\u5757\u7684\u4f53\u79ef\uff1f\u51b0\u5757\u7194\u5316\u6210\u6c34\u540e\uff0c\u4f53
\u79ef\u591a\u5927\uff1f
2. \u91d1\u5c5e\u7684\u8d28\u91cf\u662f6750\u5343\u514b\uff0c\u4f53\u79ef\u662f2.5\u7c733\u8fd9\u5757\u91d1\u5c5e\u7684\u5bc6\u5ea6\u662f\u591a\u5c11\uff1f\u82e5\u5c06\u8fd9\u5757\u91d1\u5c5e\u622a\u53bb2/3\uff0c\u5269\u4e0b\u90e8\u5206\u7684\u5bc6\u5ea6\u662f\uff1f
3.\u94c1\u7684\u5bc6\u5ea6\u662f7.8\u00d710 3\u5343\u514b/\u7c733\uff0c20\u5206\u7c733\u94c1\u5757\u7684\u8d28\u91cf\u662f\u591a\u5c11\uff1f
4\u4e00\u4e2a\u74f6\u5b50\u88c5\u6ee1\u6c34\u65f6,\u603b\u8d28\u91cf\u4e3a1.3\u5343\u514b.\u88c5\u6ee1\u7164\u6cb9\u65f6,\u603b\u8d28\u91cf\u4e3a1.14\u5343\u514b.\u6c42\u7a7a\u74f6\u7684\u8d28\u91cf.\uff1f
5\u77e5\u51b0\u7684\u5bc6\u5ea6\u4e3a0.9\u00d7103Kg/m3\uff0c\u5219\u4e00\u5757\u4f53\u79ef\u4e3a80 cm3\u7684\u51b0\u5168\u90e8\u7194\u5316\u4e3a\u6c34\u540e\uff0c\u6c34\u7684\u8d28\u91cf\u662f\u591a\u5c11g\uff0c\u6c34\u7684\u4f53\u79ef\u662f\u591a\u5c11cm3.
6\uff0e\u67d0\u516c\u56ed\u8981\u94f8\u4e00\u5c0a\u94dc\u50cf\uff0c\u5148\u7528\u6728\u6750\u5236\u6210\u4e00\u5c0a\u4e0e\u94dc\u50cf\u5927\u5c0f\u4e00\u6837\u7684\u6728\u6a21\uff0c\u73b0\u6d4b\u5f97\u6728\u6a21\u8d28\u91cf\u4e3a63Kg\uff0c\uff08\u03c1\u6728=0.7\u00d7103Kg/m3\uff0c\u03c1\u94dd=8.9\u00d7103Kg/m3\uff09\u95ee\uff1a\u9700\u8981\u591a\u5c11\u5343\u514b\u94dc\u624d\u80fd\u94f8\u6210\u6b64\u94dc\u50cf\uff1f
7.\u6709\u4e00\u79cd\u7eaa\u5ff5\u5e01\uff0c\u5b83\u7684\u8d28\u91cf\u662f16.1\u514b\uff0e\u4e3a\u4e86\u6d4b\u91cf\u5b83\u7684\u4f53\u79ef\uff0c\u628a\u5b83\u653e\u5165\u4e00\u76db\u6ee1\u6c34\u7684\u91cf\u7b52\u4e2d\uff0c\u6d4b\u5f97\u6ea2\u51fa\u7684\u6c34\u8d28\u91cf\u4e3a1\uff0e8\u514b\u3002\uff081\uff09\u6c42\u5236\u4f5c\u7eaa\u5ff5\u5e01\u7684\u91d1\u5c5e\u5bc6\u5ea6\uff1b\uff082\uff09\u8bf4\u8fd9\u79cd\u91d1\u5c5e\u7684\u540d\u79f0\u3002
8\uff0e\u90d1\u5c0f\u80d6\u5bb6\u7684\u4e00\u53ea\u74f6\u5b50\uff0c\u4e700.5kg\u9152\u521a\u597d\u88c5\u6ee1\u3002\u5c0f\u80d6\u7528\u8fd9\u53ea\u74f6\u5b50\u53bb\u4e700.5kg\u9171\u6cb9\uff0c\u7ed3\u679c\u6ca1\u6709\u88c5\u6ee1\uff0c\u5c0f\u80d6\u4ee5\u4e3a\u8425\u4e1a\u5458\u5f04\u9519\u4e86\u3002\u73b0\u5728\u8bf7\u4f60\u601d\u8003\u4e00\u4e0b\uff0c\u5230\u5e95\u662f\u8c01\u5f04\u9519\u4e86\uff1f\uff08\u03c1\u9152=0.8\u00d7103 kg/m3\uff0c\u03c1\u9171\u6cb9=1.13\u00d7103 kg/m3\uff09
9.\u4e00\u7a7a\u74f6\u88c5\u6ee1\u6c34\u540e\u8d28\u91cf\u4e3a64g\uff0c\u5c06\u6c34\u5012\u51fa\u88c5\u6ee1\u9152\u7cbe\u4e3a56g\uff0c\u6c42\u7a7a\u74f6\u7684\u5bb9\u79ef\uff1f
10. \u4f53\u79ef\u662f50cm3\u7684\u94dd\u7403\uff0c\u5b83\u7684\u8d28\u91cf\u662f54g\uff0c\u95ee\u8fd9\u4e2a\u94dd\u7403\u662f\u7a7a\u5fc3\u7684\u8fd8\u662f\u5b9e\u5fc3\u7684\uff1f\u82e5\u662f\u7a7a\u5fc3\u7684\uff0c\u7a7a\u5fc3\u90e8\u5206\u4f53\u79ef\u4e3a\u591a\u5927\uff1f\uff08\u03c1\u94dd\uff1d2.7\u00d7103kg/m3\uff09
11.\u4e00\u4e2a\u74f6\u5b50\u80fd\u76db1\u5343\u514b\u6c34\uff0c\u7528\u8fd9\u4e2a\u74f6\u5b50\u80fd\u76db\u591a\u5c11\u5343\u514b\u9152\u7cbe\uff1f
12. \u6709\u4e00\u7a7a\u74f6\u5b50\u8d28\u91cf\u662f50\u514b\uff0c\u88c5\u6ee1\u6c34\u540e\u79f0\u5f97\u603b\u8d28\u91cf\u4e3a250\u514b\uff0c\u88c5\u6ee1\u53e6\u4e00\u79cd\u6db2\u4f53\u79f0\u5f97\u603b\u8d28\u91cf\u4e3a200\u514b\uff0c\u6c42\u8fd9\u79cd\u6db2\u4f53\u7684\u5bc6\u5ea6\u3002
13.\u67d0\u540c\u5b66\u4ece\u4e00\u5747\u5300\u5927\u5ca9\u77f3\u4e0a\u7838\u4e0b\u4e00\u5c0f\u5757\u5ca9\u77f3\uff0c\u7528\u5929\u5e73\u79f0\u5f97\u8d28\u91cf\u662f27g\u3002\u653e\u5165\u88c5\u670980ml\u6c34\u7684\u91cf\u7b52\u4e2d\uff0c\u6c34\u9762\u5347\u523090ml\uff0c\u8fd9\u5757\u5ca9\u77f3\u7684\u5bc6\u5ea6\u662f\u591a\u5c11kg/m3
14.\u5c0f\u660e\u5728\u5b66\u6821\u8fd0\u52a8\u4f1a\u4e0a\u83b7\u5f97\u4e00\u5757\u5956\u724c\uff0c\u4ed6\u60f3\u77e5\u9053\u8fd9\u5757\u5956\u724c\u662f\u5426\u7531\u7eaf\u94dc\u5236\u6210\uff0c\u4e8e\u662f\u4ed6\u7528\u5929\u5e73\u548c\u91cf\u676f\u5206\u522b\u6d4b\u51fa\u8be5\u5956\u724c\u7684\u8d28\u91cf\u548c\u4f53\u79ef\u4e3a14g\u548c2cm3\uff0c\u5e76\u7b97\u51fa\u4ed6\u7684\u5bc6\u5ea6\u4e3a\u591a\u5c11g/cm3\uff1f\u5c0f\u660e\u901a\u8fc7\u67e5\u5bc6\u5ea6\u8868\u77e5\u9053\uff0c\u94dc\u7684\u5bc6\u5ea6\u4e3a8.9\u00d7103kg/m3\uff0c\u7531\u6b64\u4ed6\u5224\u65ad\u8be5\u5956\u724c_____\u7531\u7eaf\u94dc\u5236\u6210\u7684\uff08\u9009\u586b\u201c\u662f\u201d\u6216\u201c\u4e0d\u662f\u201d\uff09\u3002
15.\u4e00\u4e2a\u91cf\u7b52\uff0c\u5185\u88c580\u6beb\u5347\u9152\u7cbe\uff0c\u603b\u8d28\u91cf\u662f144\u514b\u3002\u82e5\u5c06\u9152\u7cbe\u5012\u51fa\u6539\u88c5\u6c34\uff0c\u603b\u8d28\u91cf\u662f124\u514b\uff0c\u95ee\uff081\uff09\u91cf\u7b52\u7684\u8d28\u91cf\u662f\u591a\u5c11\u514b\uff1f\uff082\uff09\u91cf\u7b52\u5185\u88c5\u4e86\u591a\u5c11\u6beb\u5347\u6c34\uff1f\uff08\u03c1\u6c34=1.0\u00d7103\u5343\u514b/\u7c733\u3001\u03c1\u9152\u7cbe=0.8\u00d7103\u5343\u514b/\u7c733\uff09
16. \uff0e\u5c0f\u660e\u5728\u73a9\u800d\u65f6\u628a\u4e00\u5c0f\u94c1\u7403\u629b\u5165\u6c34\u4e2d\uff0c\u4ed6\u53d1\u73b0\u94c1\u7403\u6d6e\u5728\u6c34\u9762\u4e0a.\u5c0f\u660e\u60f3\uff1a\u94c1\u7403\u4e3a\u4ec0\u4e48\u6d6e\u5728\u6c34\u9762\u4e0a\uff1f\u4ed6\u4f5c\u51fa\u7684\u731c\u60f3\u662f\uff1a\u94c1\u7403\u53ef\u80fd\u662f\u7a7a\u5fc3\u7684\u3002\u4ed6\u60f3\u8bbe\u8ba1\u5b9e\u9a8c\u8fdb\u884c\u63a2\u7a76\uff0c\u4ed6\u9700\u8981\u7684\u5b9e\u9a8c\u5668\u6750\u5e94\u8be5\u6709
\u901a\u8fc7\u5b9e\u9a8c\u4ed6\u6536\u96c6\u5230\u5982\u4e0b\u6570\u636e\uff1a
\u94c1\u7403\u7684\u8d28\u91cfm/g \u6c34\u7684\u4f53\u79efV\u6c34/ml \u6c34\u548c\u94c1\u7403\u7684\u603b\u4f53\u79efV\u603b/ml
79 60 75
(1)\u8be5\u5c0f\u94c1\u7403\u662f\u7a7a\u5fc3\u7684\uff0c\u8fd8\u662f\u5b9e\u5fc3\u7684\uff1f\u5199\u51fa\u4f9d\u636e\u3002
(2)\u82e5\u5c0f\u94c1\u7403\u662f\u7a7a\u5fc3\u7684\uff0c\u7a7a\u5fc3\u90e8\u5206\u7684\u4f53\u79ef\u662f\u591a\u5927\uff1f
17\uff0e\u201c\u4e4c\u9e26\u559d\u6c34\u201d\u7684\u6545\u4e8b\u4f60\u4e0d\u964c\u751f\u5427\uff0e\u5982\u56fe\u6240\u793a\uff0c\u82e5\u6709\u4e00\u53ea\u5bb9\u79ef\u4e3a3\u00d710-4m3\u7684\u74f6\u5185\u76db\u67090.2kg\u7684\u6c34\uff0c\u4e00\u53ea\u53e3\u6e34\u7684\u4e4c\u9e26\u6bcf\u6b21\u5c06\u4e00\u5757\u8d28\u91cf\u4e3a10g\u7684\u5c0f\u77f3\u5b50\u6295\u5165\u74f6\u4e2d\uff0c\u5f53\u4e4c\u9e26\u6295\u5165\u4e8625\u5757\u76f8\u540c\u7684\u5c0f\u77f3\u5b50\u540e\uff0c\u6c34\u9762\u5347\u5230\u74f6\u53e3\uff0c\u6c42\uff1a\uff081\uff09\u74f6\u5185\u77f3\u5757\u7684\u603b\u4f53\u79ef\uff1b\uff082\uff09\u77f3\u5757\u7684\u5bc6\u5ea6\uff0e
18\uff0e\u6709\u4e00\u79cd\u7eaa\u5ff5\u5e01\uff0c\u5b83\u7684\u8d28\u91cf\u662f16.1\u514b\uff0e\u4e3a\u4e86\u6d4b\u91cf\u5b83\u7684\u4f53\u79ef\uff0c\u628a\u5b83\u653e\u5165\u4e00\u76db\u6ee1\u6c34\u7684\u91cf\u7b52\u4e2d\uff0c\u6d4b\u5f97\u6ea2\u51fa\u7684\u6c34\u91cd\u4e3a1.8\u00d710\uff0d2\u725b\uff0e
\uff081\uff09\u6c42\u5236\u4f5c\u7eaa\u5ff5\u5e01\u7684\u91d1\u5c5e\u5bc6\u5ea6\uff1b
\uff082\uff09\u8bf4\u8fd9\u79cd\u91d1\u5c5e\u7684\u540d\u79f0\uff1b
\uff083\uff09\u76db\u6ee1\u6c34\u7684\u91cf\u7b52\u5728\u653e\u5165\u7eaa\u5ff5\u5e01\u7684\u524d\u540e\u5206\u522b\u7528\u5929\u5e73\u53bb\u79f0\u91cf\uff0c\u8ba1\u7b97\u793a\u6570\u7684\u53d8\u5316\u91cf\u3002
19\uff0e\u6211\u56fd\u7ea6\u67094\u4ebf\u591a\u4eba\u914d\u5e26\u8fd1\u89c6\u773c\u955c,\u773c\u955c\u7684\u4e3b\u8981\u6750\u6599\u7684\u90e8\u5206\u6280\u672f\u6307\u6807\u5982\u4e0b\u8868:
\u6750\u6599 \u6811\u8102\u955c\u7247 \u73bb\u7483\u955c\u7247 \u94dc\u5408\u91d1 \u949b\u5408\u91d1
\u900f\u5149\u91cf 92% 91%
\u5bc6\u5ea6/kg•m-3 1.3\u00d7103 2.5\u00d7103 8.0\u00d7103 4.5\u00d7103
\u6027\u80fd \u8f83\u8010\u78e8\u635f \u8010\u78e8\u635f \u8f83\u8010\u78e8\u635f \u8010\u8150\u8680
\uff081\uff09\u6c42\u4e00\u5757\u4f53\u79ef\u4e3a4\u00d710-6m3\u73bb\u7483\u955c\u7247\u7684\u8d28\u91cf\u4e3a\u591a\u5c11?
\uff082\uff09 \u5982\u56fe12\u6240\u793a,\u4e00\u526f\u94dc\u5408\u91d1\u67b6\u7684\u8d28\u91cf\u4e3a2\u00d710-2kg,\u82e5\u4ee5\u949b\u5408\u91d1\u4ee3\u66ff\u94dc\u5408\u91d1,\u6c42\u4e00\u526f\u4ee5\u949b\u5408\u91d1\u955c\u67b6\u7684\u8d28\u91cf.
20\uff0e\u8001\u677f\u6d3e\u5c0f\u59da\u53bb\u8ba2\u8d2d\u9152\u7cbe\uff0c\u5408\u540c\u4e0a\u8981\u6c42\u9152\u7cbe\u7684\u5bc6\u5ea6\u5c0f\u4e8e\u6216\u8005\u662f\u7b49\u4e8e0.82g/cm3\u5c31\u7b97\u8fbe\u6807\uff0c\u5c0f\u59da\u5728\u62bd\u6837\u68c0\u67e5\u65f6\uff0c\u53d6\u9152\u7cbe\u7684\u6837\u672c500ml\uff0c\u79f0\u5f97\u7684\u8d28\u91cf\u662f420g. \u8bf7\u4f60\u901a\u8fc7\u8ba1\u7b97\u8bf4\u660e\u5c0f\u59da\u7684\u7ed3\u8bba\u662f (A \u8fbe\u6807 B \u4e0d\u8fbe\u6807\uff0c\u542b\u6c34\u592a\u591a) \u4f60\u8ba4\u4e3a\u5c0f\u59da\u8be5\u600e\u4e48\u529e?
(\u03c1\u9152=0.8\u00d7103 kg/m3 \u03c1\u6c34=1.0\u00d7103 kg/m3)
21\uff0e. \u5b9e\u9a8c\u5ba4\u6709\u4e0b\u5217\u56db\u79cd\u91cf\u7b52\uff0c\u5206\u522b\u6807\u6709\u6700\u5927\u523b\u5ea6\u503c\u548c\u6700\u5c0f\u523b\u5ea6\u503c\uff0c\u8981\u4e00\u6b21\u8f83\u51c6\u786e\u91cf\u51fa100 g\u5bc6\u5ea6\u4e3a0.8\u00d7103 kg/m3\u7684\u9152\u7cbe\uff0c\u5219\u9009\u7528\u7684\u91cf\u7b52\u5e94\u8be5\u662f \uff08 \uff09
A\u3001500ml 10ml B\u3001 100ml 2ml C\u3001250ml 5ml D\u300150ml 2ml
22\uff0e\u67d0\u540c\u5b66\u7528\u4e00\u53ea\u73bb\u7483\u676f\uff0c\u6c34\u548c\u5929\u5e73\u6d4b\u4e00\u5757\u77f3\u5b50\u7684\u5bc6\u5ea6\u3002\u4ed6\u628a\u676f\u5b50\u88c5\u6ee1\u6c34\u540e\u79f0\u5f97\u603b\u8d28\u91cf\u662f200g\uff0c\u653e\u5165\u77f3\u5b50\u540e\uff0c\u5c06\u6c34\u6ea2\u51fa\u4e00\u90e8\u5206\u4ee5\u540e\u79f0\u5f97\u603b\u8d28\u91cf\u662f215g\uff0c\u628a\u77f3\u5b50\u4ece\u676f\u4e2d\u53d6\u51fa\uff0c\u79f0\u5f97\u6c34\u548c\u676f\u5b50\u7684\u8d28\u91cf\u4e3a190g\uff0c\u6c42\u77f3\u5b50\u7684\u5bc6\u5ea6\u3002
23\uff0e\u5c0622g\u76d0\u5b8c\u5168\u6eb6\u89e3\u5728\u5982\u56fe13\u7532\u6240\u793a\u7684\u91cf\u7b52\u5185\u7684\u6c34\u4e2d\uff0c\u6db2\u9762\u5347\u9ad8\u540e\u7684\u4f4d\u7f6e\u5982\u56fe\u4e59\u6240\u793a\u3002\u5219\u76d0\u6c34\u7684\u7684\u5bc6\u5ea6\u4e3a\u591a\u5c11\uff1f
\u5c0f\u4e3d\u540c\u5b66\u7684\u89e3\u7b54\u662f\u8fd9\u6837\uff1a
\u89e3\uff1a\u03c1=m/v=22g\u00f710\u339d3=2.2g/\u339d3=2.2\u00d7103kg/m3\u3002
\u5c0f\u4e3d\u540c\u5b66\u7684\u89e3\u7b54\u662f\u5426\u6b63\u786e\uff0c\u8bf7\u4f60\u505a\u51fa\u8bc4\u4ef7\u3002\u5982\u679c\u6709\u9519\u8bef\uff0c\u8bf7\u5199\u51fa\u6b63\u786e\u7684\u8fc7\u7a0b\u3002
\u7b54\u6848
\uff081\uff09\u5df2\u77e5\uff1am\uff08\u51b0\uff09=9\u338f p(\u51b0\uff09=0.9\u00d710³\u338f\u2215m³ p(\u6c34\uff09=1\u00d710³\u338f\u2215m³
\u6c42\uff1aV\uff08\u51b0\uff09\uff0c V\uff08\u6c34\uff09
\u89e3\uff1aV\uff08\u51b0\uff09= m\uff08\u51b0\uff09\uff0f p(\u51b0\uff09=9\u338f\uff0f0.9\u00d710³\u338f\u2215m³ =10\uff0d²m³
V\uff08\u6c34\uff09= m\uff08\u51b0\uff09\u00d7\uff0fp(\u6c34\uff09=9\u338f\uff0f1\u00d710³\u338f\u2215m³ =9\u00d7 10\uff0d³m³
\u7b54\uff1b\u51b0\u5757\u7684\u4f53\u79ef\u662f10\uff0d²m³\uff0c \u51b0\u5757\u7194\u5316\u6210\u6c34\u540e\uff0c\u4f53
\u79ef\u662f9\u00d7 10\uff0d³m³\u3002
\u56de\u7b54\u4eba\u7684\u8865\u5145 2009-12-30 23:35
(2\uff09\u5df2\u77e5\uff1am=6750\u338f V=2.5m³
\u6c42\uff1ap
\u89e3\uff1ap=m\uff0fv=6750\u338f\uff0f2.5m³=2.7\u00d710³\u338f\uff0fm³
\u7b54\uff1a\u8fd9\u5757\u91d1\u5c5e\u7684\u5bc6\u5ea6\u662f2.7\u00d710³\u338f\uff0fm³\u82e5\u5c06\u8fd9\u5757\u91d1\u5c5e\u622a\u53bb2/3\uff0c\u5269\u4e0b\u90e8\u5206\u7684\u5bc6\u5ea6\u662f2.7\u00d710³\u338f\uff0fm³\u3002
(3)\u5df2\u77e5\uff1ap=7.8\u338f\u00d710³\uff0fm³ V=20dm³=2\u00d710\uff0d²m³
\u6c42\uff1am
\u89e3\uff1bm=p\u00d7v=7.8\u338f\u00d710³\uff0fm³ \u00d7 2\u00d710\uff0d²m³ =156\u338f
\u7b54\uff1a\u94c1\u5757\u7684\u8d28\u91cf\u662f156\u338f
\uff085\uff09\u5df2\u77e5\uff1ap(\u51b0\uff09=0.9\u00d710³\u338f\uff0fm³ =0.9g\uff0f cm³ p(\u6c34\uff09=1g\u2215cm³ V(\u51b0\uff09=80 cm³
\u6c42\uff1am(\u6c34\uff09V(\u6c34\uff09
\u89e3\uff1am(\u6c34\uff09=m(\u51b0\uff09=p(\u51b0\uff09\u00d7V(\u51b0\uff09=0.9g\uff0f cm³ \u00d780 cm³\uff1d72g
V(\u6c34\uff09=m(\u6c34\uff09\uff0fp(\u6c34\uff09=72g\uff0f1g\u2215cm³ =72 cm³
\u7b54\uff1a\u6c34\u7684\u8d28\u91cf\u662f72g\uff0c\u6c34\u7684\u4f53\u79ef\u662f72cm³\u3002
\uff086\uff09\u5df2\u77e5\uff1a
m(\u6728)= 63Kg \u03c1\u6728=0.7\u00d710³Kg/m3\uff0c\u03c1\u94dc=8.9\u00d710³Kg/m3
\u6c42\uff1am{\u94dc}
\u89e3\uff1aV(\u94dc)= V(\u6728)= m(\u6728) \uff0f\u03c1\u6728= 63Kg\uff0f0.7\u00d710³Kg/m3=9\u00d710\u2227-2 m³
m(\u94dc)= \u03c1\u94dc\u00d7V(\u94dc)=8 .9\u00d710³Kg/m3\u00d79\u00d710\u2227-2 m³=801\u338f
\u7b54\uff1a\u9700\u8981801\u5343\u514b\u94dc\u624d\u80fd\u94f8\u6210\u6b64\u94dc\u50cf
\uff087\uff09\u5df2\u77e5\uff1am\u91d1=16.1g m\u6c34=1.8g p(\u6c34\uff09=1g\u2215cm³
\u6c42\uff1aV\u91d1=V\u6c34= m\u6c34\uff0fp(\u6c34\uff09=1.8g\uff0f1g\u2215cm³=1.8cm³
P\u91d1=m\u91d1\uff0fV\u91d1=16.1g\uff0f1.8cm³\u22488.9 g\u2215cm³
\u7b54\uff1a\u6c42\u5236\u4f5c\u7eaa\u5ff5\u5e01\u7684\u91d1\u5c5e\u5bc6\u5ea68.9 g\u2215cm³\uff0c\u8fd9\u79cd\u91d1\u5c5e\u7684\u540d\u79f0\u662f\u94dc.\u3002
\u6c42(8)\u5df2\u77e5\uff1am\u9152=0.5\u338f m\u9171=0.5\u338f \u03c1\u9152=0.8\u00d710³ kg/m3\uff0c\u03c1\u9171\u6cb9=1.13\u00d710³ kg/m3
\uff1aV\u9152 V\u9171
\u89e3\uff1a\u2235V\u9152= m\u9152\uff0f\u03c1\u9152\uff1d0.5\u338f\uff0f0.8\u00d710³ kg/m3\uff1d6.25\u00d710\u2227\uff0d4m³
V\u9171= m\u9171\uff0f\u03c1\u9171\u6cb9\uff1d0.5\u338f\uff0f1.13\u00d710³ kg/m3\u22484.42\u00d710\u2227\uff0d4m³
\u2234V\u9152\uff1eV\u9171
\u2234\u9171\u6cb9\u6ca1\u6709\u88c5\u6ee1
\u7b54\uff1a\u5c0f\u80d6\u5f04\u9519\u4e86\u3002
(9)\u5df2\u77e5\uff1am\uff08\u7a7a\uff0b\u6c34\uff5d=64g m(\u7a7a|\uff0b\u9152)=56g p(\u6c34\uff09=1g\u2215cm³ \u03c1\u9152=0.8g\uff0fcm ³
\u6c42\uff1aV\u7a7a
\u89e3\uff1a\u2235m\uff08\u7a7a\uff0b\u6c34\uff5d=64g m(\u7a7a|\uff0b\u9152)=56g
\u2234m\uff08\u7a7a\uff09= m\uff08\u7a7a\uff0b\u6c34\uff5d\uff0fm(\u7a7a|\uff0b\u9152) \uff1d64g\uff0d56g=8g
\u03c1\uff08\u7a7a\uff09\uff1dp(\u6c34\uff09\uff0d\u03c1\u9152\uff1d1g\u2215cm³ \uff0d0.8g\uff0fcm³=0.2 g\u2215cm³
\u2234V\u7a7a\uff1dm\uff08\u7a7a\uff09\uff0f\u03c1\uff08\u7a7a\uff09\uff1d8g\uff0f0.2 g\u2215cm³=40cm³
\u7b54\uff1a\u7a7a\u74f6\u7684\u5bb9\u79ef\u662f40cm³
\uff0810\uff09\u5df2\u77e5\uff1aV1=50cm³ m1=54g \u03c1\u94dd\uff1d2.7\u00d710³kg/m3\uff1d2.7 g\uff0fcm³
\u6c42\uff1a\u94dd\u7403\u662f\u7a7a\u5fc3\u7684\u8fd8\u662f\u5b9e\u5fc3\uff0c\u82e5\u662f\u7a7a\u5fc3\u7684\uff0c\u7a7a\u5fc3\u90e8\u5206\u4f53\u79ef
\u89e3\uff1a\u2235\u03c11= m1\uff0fV1\uff1d54g\uff0f50cm³\uff1d1.08g\uff0fcm³
\u2234\u03c11\uff1c\u03c1\u94dd
\u2234\u94dd\u7403\u662f\u7a7a\u5fc3\u7684
v\u94dd= V1
m\u94dd\uff1d\u03c1\u94dd\u00d7V1\uff1d2.7 g\uff0fcm³\u00d750cm³\uff1d135g
m2= m\u94dd\uff0dm1=135g\uff0d54g\uff1d81g
\u03c12=\u03c11\uff1d1.08g\uff0fcm³
V2= m2\uff0f\u03c11\uff1d81g\uff0f1.08g\uff0fcm³\uff1d75 cm³
\u7b54\uff1a\u8fd9\u4e2a\u94dd\u7403\u662f\u7a7a\u5fc3\uff0c\u7a7a\u5fc3\u90e8\u5206\u4f53\u79ef\u4e3a75 cm³\u3002
\uff0811\uff09\u5df2\u77e5\uff1am\u6c34=1\u338f p\u6c34=1\u00d710³\u338f\uff0fm³ p\u9152=0.8\u00d710³ kg/³
\u6c42\uff1am\u9152
\u89e3\uff1aV\u9152=V\u74f6=V\u6c34= m\u6c34\uff0fp\u6c34\uff1d1\u338f\uff0f1\u00d710³\u338f\uff0fm³\uff1d1\u00d710\u2227\uff0d3m³
m\u9152\uff1dp\u9152\u00d7V\u9152\uff1d0.8\u00d710³ kg/³\u00d71\u00d710\u2227\uff0d3m³\uff1d0.8\u338f
\u7b54\uff1a\u7528\u8fd9\u4e2a\u74f6\u5b50\u80fd\u76db0.8\u5343\u514b\u9152\u7cbe\u3002
\uff0812\uff09\u5df2\u77e5\uff1am\u7a7a=50g m\u6c34=m\u603b\u2014m\u7a7a=250g\uff0d50g\uff1d200g
m2= m\u603b\u2014m\u7a7a\uff1d200g-50g=150g p(\u6c34\uff09=1g\u2215cm³
\u6c42\uff1ap2
\u89e3\uff1aV2=V\u7a7a=V\u6c34= m\u6c34\uff0fp\u6c34\uff1d200g \uff0f1g\u2215cm³=200cm³
p2\uff1dm2\uff0fV2\uff1d150g\uff0f200cm³\uff1d0.75 g\u2215cm³
\u7b54\uff1a\u8fd9\u79cd\u6db2\u4f53\u7684\u5bc6\u5ea6\u662f0.75 g\u2215cm³\u3002
\uff0813\uff09\u5df2\u77e5\uff1am=27g V=90ml\uff0d80ml=10ml
\u6c42\uff1ap
\u89e3\uff1ap\uff1dm\uff0fV=27g\uff0f10ml=2.7 g\u2215cm³=2.7\u00d710 ³\u338f\uff0fm ³
\u7b54\uff1a\u8fd9\u5757\u5ca9\u77f3\u7684\u5bc6\u5ea6\u662f2.7\u00d710 ³\u338f\uff0fm ³.
(14)\u5df2\u77e5\uff1am=14g V=2cm³
\u6c42\uff1ap
\u89e3\uff1a\u2235p=m\uff0fv=14g\uff0f2cm³=7 g\u2215cm³=7\u00d710 ³\u338f\uff0fm ³
\u2234p\uff1cp\u94dc
\u7b54\uff1a\u4ed6\u7684\u5bc6\u5ea6\u4e3a7\u00d710 ³\u338f\uff0fm ³\uff0c\u8be5\u5956\u724c__\u4e0d\u662f___\u7531\u7eaf\u94dc\u5236\u6210\u7684
\u4e00\u3001\u57fa\u672c\u9898\uff1a
1\uff0e\u6c34\u7684\u5bc6\u5ea6\u662f Kg/m3\uff0c\u5b83\u7684\u7269\u7406\u610f\u4e49\u662f \u3002
2\uff0e\u7532\u3001\u4e59\u4e24\u79cd\u7269\u8d28\u5206\u522b\u5236\u6210\u7684\u5b9e\u5fc3\u7269\u4f53\uff0c\u5176\u8d28\u91cf\u4e4b\u6bd4\u4e3a3:2\uff0c\u4f53\u79ef\u4e4b\u6bd4\u4e3a3:4\uff0c\u5219
\u7532\u3001\u4e59\u4e24\u7269\u8d28\u7684\u5bc6\u5ea6\u4e4b\u6bd4\u662f \u3002
3\uff0e\u7532\u4e59\u4e24\u4e2a\u5b9e\u5fc3\u7403\uff0c\u7532\u7403\u7684\u4f53\u79ef\u662f\u4e59\u7403\u4f53\u79ef\u76842\u500d\uff0c\u7532\u7403\u7684\u8d28\u91cf\u662f\u4e59\u7403\u8d28\u91cf\u76841/2\uff0c
\u5219\u7532\u4e59\u4e24\u7403\u7684\u5bc6\u5ea6\u4e4b\u6bd4\u662f\uff08 \uff09\u3002
A\uff0e1:4 B. 1:1 C.2:1 D. 4:1
4\uff0e\u4e00\u5757\u51b0\u5316\u6210\u6c34\u4ee5\u540e\u5bc6\u5ea6 \uff0c\u8d28\u91cf \u3002
5\uff0e\u5bf9\u5bc6\u5ea6\u516c\u5f0f\u03c1=m/v\u7684\u6b63\u786e\u7406\u89e3\u662f\uff08 \uff09\u3002
A\uff0e\u540c\u79cd\u7269\u8d28\u7684\u8d28\u91cf\u8ddf\u4f53\u79ef\u6210\u6b63\u6bd4 B. \u540c\u79cd\u7269\u8d28\u7684\u5bc6\u5ea6\u8ddf\u5176\u8d28\u91cf\u6210\u6b63\u6bd4
C\uff0e\u540c\u79cd\u7269\u8d28\u7684\u5bc6\u5ea6\u8ddf\u5176\u4f53\u79ef\u6210\u6b63\u6bd4 D. \u4ee5\u4e0a\u8bf4\u6cd5\u90fd\u4e0d\u5bf9
6\u3001\u901a\u5e38\u8bf4\u94c1\u6bd4\u68c9\u82b1\u91cd\u5b9e\u8d28\u662f\u6307 \u3001\u6216 \u3002
7\uff0e\u98de\u673a\u7684\u673a\u8eab\u7528\u94dd\u5408\u91d1\u800c\u4e0d\u7528\u94a2\u94c1\u5236\u9020\uff0c\u662f\u56e0\u4e3a\u94dd\u5408\u91d1\u7684 \u6bd4\u94a2\u94c1\u7684\u5c0f\u3002
8\uff0e\u4e00\u652f\u8d28\u91cf\u662f200\u514b\u5bc6\u5ea6\u662f0.9\u00d7103Kg/m3\u7684\u8721\uff0c\u4f53\u79ef\u662f \u5398\u7c733\uff0c\u70b9\u71c3\u540e\uff0c
\u82e5\u8fd9\u652f\u8721\u70e7\u6389\u4e00\u534a\uff0c\u5269\u4f59\u90e8\u5206\u7684\u5bc6\u5ea6\u662f Kg/m3\u3002
9\u3001 \u24601\u7c733\u7684\u51b0\uff0c\u5316\u6210\u6c34\u540e\uff0c\u5b83\u7684\u8d28\u91cf\u662f \u5343\u514b\uff0c\u4f53\u79ef\u662f \u7c733\u3002
\u2461\u8d28\u91cf\u662f900\u5343\u514b\u7684\u6c34\u5b8c\u5168\u7ed3\u6210\u51b0\u540e\uff0c\u4f53\u79ef\u589e\u5927\u4e86\u591a\u5c11\u7c733\uff1f
\uff08\u03c1\u51b0=0.9\u00d7103Kg/m3\uff09
10\uff0e\u5b89\u88c5\u7535\u8def\u9700\u8981\u6a2a\u622a\u9762\u79ef\u4e3a25\u6beb\u7c73\u7684\u94dc\u5bfc\u7ebf8000\u7c73\uff0c\u95ee\u5e94\u8d2d\u4e70 \u5343\u514b\u7684\u94dc\u5bfc\u7ebf\u3002\uff08\u03c1\u94dc=8.9\u00d7103Kg/m3\uff09
11\u3001\u4e0b\u5217\u662f\u6d4b\u6db2\u4f53\u5bc6\u5ea6\u7684\u5b9e\u9a8c\u6b65\u9aa4\uff0c\u8bf7\u6309\u6b63\u786e\u987a\u5e8f\u586b\u7a7a\uff1a
A\uff0e\u628a\u73bb\u7483\u676f\u4e2d\u7684\u76d0\u6c34\u5012\u5165\u91cf\u7b52\u4e2d\u4e00\u90e8\u5206\uff0c\u8bb0\u4e0b\u91cf\u7b52\u4e2d\u76d0\u6c34\u7684\u4f53\u79ef\u3002
B\uff0e\u79f0\u51fa\u73bb\u7483\u676f\u548c\u676f\u4e2d\u5269\u4e0b\u7684\u76d0\u6c34\u7684\u8d28\u91cf\u3002
C\uff0e\u5728\u73bb\u7483\u676f\u4e2d\u76db\u76d0\u6c34\uff0c\u79f0\u51fa\u5b83\u4eec\u7684\u8d28\u91cf\u3002
\uff081\uff09 \uff0c\uff082\uff09 \uff0c\uff083\uff09 \u3002
12\u3001\u7528\u6258\u76d8\u5929\u5e73\u6d4b\u91cf\u70e7\u676f\u5185\u76d0\u6c34\u7684\u8d28\u91cf\uff0c\u6709\u4e0b\u5217\u4e00\u4e9b\u5b9e\u9a8c\u6b65\u9aa4\uff1a
A\uff0e\u7528\u5929\u5e73\u79f0\u51fa\u70e7\u676f\u548c\u76d0\u6c34\u7684\u603b\u8d28\u91cf\u3002 B\uff0e\u8c03\u8282\u5929\u5e73\u6a2a\u6881\u5e73\u8861\u3002
C\uff0e\u5c06\u6258\u76d8\u5929\u5e73\u653e\u5728\u6c34\u5e73\u684c\u9762\u4e0a\uff0c\u79fb\u52a8\u6e38\u7801\u81f3\u6807\u5c3a\u7684\u96f6\u523b\u7ebf\u5904\u3002
D\uff0e\u7528\u5929\u5e73\u79f0\u51fa\u7a7a\u70e7\u676f\u7684\u8d28\u91cf\u3002 E\uff0e\u5c06\u76d0\u6c34\u5012\u5165\u7a7a\u70e7\u676f\u4e2d\u3002
F\uff0e\u7b97\u51fa\u70e7\u676f\u5185\u76d0\u6c34\u7684\u8d28\u91cf\u3002 \u4ee5\u4e0a\u8fd9\u4e9b\u5b9e\u9a8c\u6b65\u9aa4\u7684\u5408\u7406\u987a\u5e8f\u5e94\u662f\uff1a \u3002
13\u3001\u4e0d\u7528\u5929\u5e73\u53ea\u7528\u91cf\u7b52\uff0c\u5982\u4f55\u91cf\u51fa1\u5343\u514b\u7684\u9152\u7cbe\u3002
\u4e8c\u3001\u7a7a\u5fc3\u95ee\u9898\uff1a
1\u3001\u5b66\u6821\u7684\u4e00\u53ea\u94c5\u7403\u4f53\u79ef\u7ea60.52\u5206\u7c733\uff0c\u8d28\u91cf\u662f4\u5343\u514b\uff0c\u5df2\u77e5\u94c5\u7684\u5bc6\u5ea6\u662f
11.3\u00d7103Kg/m3\uff0c\u5b83\u662f\u94c5\u505a\u7684\u5417\uff1f\u901a\u8fc7\u8ba1\u7b97\u8bc1\u660e\u3002
2\u3001\u4e00\u4e2a\u7a7a\u5fc3\u94dc\u7403\uff0c\u8d28\u91cf\u662f178\u514b\uff0c\u7403\u7684\u4f53\u79ef\u662f50\u5398\u7c733\uff0c\u95ee\u6b64\u7403\u4e2d\u7a7a\u90e8\u5206\u4f53\u79ef\u662f
\u591a\u5c11\u7c733\uff1f(\u03c1\u94dc=8.9\u00d7103Kg/m3)
3\u3001\u4f53\u79ef\u4e3a20\u5398\u7c733\u7684\u7a7a\u5fc3\u94dc\u7403\u7684\u8d28\u91cf\u4e3a89\u514b\uff0c\u5f80\u5b83\u7684\u7a7a\u5fc3\u90e8\u5206\u6ce8\u6ee1\u67d0\u79cd\u6db2\u4f53\u540e\uff0c\u603b\u8d28\u91cf\u4e3a225\u514b\uff0c\u95ee\u6ce8\u5165\u7684\u662f\u4ec0\u4e48\u6db2\u4f53\uff1f\uff08\u03c1\u94dc=8.9\u00d7103Kg/m3\uff09
4\u3001\u4f53\u79ef\u662f20\u5398\u7c733\uff0c\u8d28\u91cf\u662f89\u514b\u7684\u7a7a\u5fc3\u94dc\u7403\uff0c\u5728\u5176\u4e2d\u7a7a\u5fc3\u90e8\u5206\u94f8\u6ee1\u94c5\uff0c\u7403\u7684\u603b\u8d28\u91cf\u662f\u591a\u5c11\uff1f\uff08\u03c1\u94dc=8.9\u00d7103Kg/m3\uff0c\u03c1\u94c5=11.3\u00d7103Kg/m3\uff09
\u4e09\u3001\u5408\u91d1\uff08\u6df7\u5408\uff09\u95ee\u9898\uff1a
1\u3001\u4e00\u5757\u91d1\u94f6\u5408\u91d1\u5757\uff0c\u5176\u8d28\u91cf\u4e3a530\u514b\uff0c\u4f53\u79ef\u4e3a35\u5398\u7c733\u3002\u5df2\u77e5\u91d1\u7684\u5bc6\u5ea6\u03c11 = 19.3\u00d7103Kg/m3\uff0c\u94f6\u7684\u5bc6\u5ea6\u03c12 = 10.5\u00d7103Kg/m3\uff0c\u6c42\u5408\u91d1\u5757\u4e2d\u542b\u6709\u91d1\u5b50\u7684\u8d28\u91cf\uff1f
2\u3001\u6bcf\u5e746~7\u6708\u4efd\u6c5b\u671f\u94b1\u5858\u6c5f\u4e0a\u6e38\u6da8\u6c34\uff0c\u6c34\u4e2d\u542b\u7802\u91cf\u589e\u52a0\uff0c\u4e3a\u4fdd\u8bc1\u676d\u57ce\u5c45\u6c11\u81ea\u6765\u6c34\u6e90\u7684\u8d28\u91cf\uff0c\u4ee5\u4fbf\u91c7\u53d6\u5bf9\u7b56\uff0c\u79d1\u5b66\u5de5\u4f5c\u8005\u5bf9\u94b1\u5858\u6c5f\u6c34\u542b\u7802\u91cf\u8fdb\u884c\u68c0\u6d4b\uff1a\u91c7\u6c34\u683750\u5347\uff0c\u79f0\u5f97\u6c5f\u6c34\u8d28\u91cf50.05\u5343\u514b\uff0c\u5df2\u77e5\u5e72\u7802\u571f\u5bc6\u5ea62.4\u00d7103Kg/m3\uff0c\u6c42\u6c5b\u671f\u4e2d\u6bcf\u7acb\u65b9\u7c73\u6c5f\u6c34\u4e2d\u7684\u542b\u7802\u91cf\u3002
3\u3001\u7528\u76d0\u6c34\u9009\u79cd\uff0c\u8981\u6c42\u76d0\u6c34\u7684\u5bc6\u5ea6\u4e3a1.2\u00d7103Kg/m3\uff0c\u73b0\u5728\u914d\u5236\u4e860.4\u5347\u7684\u76d0\u6c34\uff0c\u79f0\u5f97\u5176\u8d28\u91cf\u4e3a0.52\u5343\u514b\uff0c\u914d\u5236\u7684\u76d0\u6c34\u662f\u5426\u7b26\u5408\u8981\u6c42\uff08\u7528\u8ba1\u7b97\u7684\u65b9\u6cd5\u8bf4\u660e\uff09\uff1f\u5e94\u52a0\u6c34\u8fd8\u662f\u52a0\u76d0\uff1f\u52a0\u591a\u5c11\uff1f
4\u3001\u516c\u5143\u524d\u4e8c\u767e\u591a\u5e74\uff0c\u5e0c\u814a\u5b66\u8005\u963f\u57fa\u7c73\u5fb7\u66fe\u4e3a\u56fd\u738b\u9274\u5b9a\u8fc7\u4e00\u9876\u738b\u51a0\uff0c\u770b\u5b83\u662f\u5426\u662f\u7eaf\u91d1\u5236\u6210\u7684\u3002\u4ed6\u628a\u8d28\u91cf\u4e3a350\u514b\u7684\u738b\u51a0\u6c89\u6ca1\u5728\u6c34\u4e2d\u65f6\uff0c\u670922.5\u5398\u7c733\u7684\u6c34\u88ab\u6392\u51fa\uff0c\u90a3\u4e48\u80fd\u9274\u5b9a\u51fa\u8fd9\u9876\u738b\u51a0\u662f\u7eaf\u91d1\u5236\u6210\u7684\u5417\uff1f\u4e3a\u4ec0\u4e48\uff1f\u5982\u679c\u540e\u6765\u5236\u4f5c\u738b\u51a0\u7684\u4eba\u627f\u8ba4\u4e86\uff0c\u4ed6\u5728\u5236\u4f5c\u65f6\u63ba\u8fdb\u4e86\u767d\u94f6\uff0c\u90a3\u4e48\u8ba1\u7b97\u4e00\u4e0b\u5728\u738b\u51a0\u91cc\u4ed6\u63ba\u8fdb\u4e86\u591a\u5c11\u767d\u94f6\uff1f\uff08\u91d1\u7684\u5bc6\u5ea6\u662f19.3\u00d7103Kg/m3\uff0c\u94f6\u7684\u5bc6\u5ea6\u662f10.5\u00d7103Kg/m3\uff09
5\u3001\u6709\u4e00\u4e2a\u8d28\u91cf\u4e3a5\u5343\u514b\u7684\u5408\u91d1\u7403\uff0c\u5176\u4e2d\u94c5\u548c\u94c1\u7684\u4f53\u79ef\u5404\u5360\u4e00\u534a\uff0c\u6c42\u6b64\u5408\u91d1\u7684\u5bc6\u5ea6\uff1f
\u56db\u3001\u74f6\u5b50\u95ee\u9898\uff1a
1\u3001\u4e00\u4e2a\u7a7a\u74f6\u7684\u8d28\u91cf\u662f0.2\u5343\u514b\uff0c\u88c5\u6ee1\u6c34\u540e\u603b\u8d28\u91cf\u662f1\u5343\u514b\uff0c\u8fd9\u4e2a\u74f6\u5b50\u6700\u591a\u80fd\u88c5\u4e0b\u591a\u5c11\u9152\u7cbe\uff1f\uff08\u03c1\u9152=0.8\u00d7103Kg/m3\uff09
2\u3001\u6709\u4e00\u88c5\u6ee1\u6cb9\u7684\u6cb9\u74f6\uff0c\u6cb9\u548c\u74f6\u7684\u603b\u8d28\u91cf1.46\u5343\u514b\uff0c\u5df2\u77e5\u74f6\u7684\u8d28\u91cf\u662f0.5\u5343\u514b\uff0c\u74f6\u7684\u5bb9\u79ef\u662f1.2\u5206\u7c733\uff0c\u95ee\u6cb9\u7684\u5bc6\u5ea6\u662f\u591a\u5c11\uff1f
3\u3001\u5b9e\u9a8c\u5ba4\u4e2d\u6709\u4e00\u79cd\u74f6\u5b50\u4e13\u7528\u4e8e\u6d4b\u5b9a\u6db2\u4f53\u5bc6\u5ea6\uff0c\u8fd9\u79cd\u74f6\u5b50\u53eb\u5bc6\u5ea6\u74f6\u3002\u82e5\u74f6\u5b50\u7684\u8d28\u91cf\u662f10\u514b\uff0c\u88c5\u6ee1\u6c34\u540e\uff0c\u6c34\u548c\u74f6\u5b50\u7684\u8d28\u91cf\u662f20\u514b\u3002\u88c5\u6ee1\u6cb9\u540e\uff0c\u6cb9\u548c\u74f6\u5b50\u7684\u8d28\u91cf\u662f18\u514b\u3002\u6c42\u8fd9\u79cd\u6cb9\u7684\u5bc6\u5ea6\uff1f
\u7ec3\u4e60\uff1a\u4e00\u4e2a\u74f6\u5b50\u7684\u8d28\u91cf\u662f0.40\u5343\u514b\uff0c\u88c5\u6ee1\u6c34\u65f6\u8d28\u91cf\u662f0.90\u5343\u514b\uff0c\u88c5\u6ee1\u53e6\u4e00\u79cd\u6db2\u4f53\u65f6\u7684\u8d28\u91cf0.85\u5343\u514b\uff0c\u6c42\u53e6\u4e00\u79cd\u6db2\u4f53\u7684\u5bc6\u5ea6
4\u3001\u4e00\u4e2a\u7a7a\u74f6\u88c5\u6ee1\u6c34\u65f6\uff0c\u74f6\u6c34\u603b\u8d28\u91cf64\u514b\uff0c\u88c5\u6ee1\u7164\u6cb9\u65f6\uff0c\u74f6\u6cb9\u603b\u8d28\u91cf\u662f56\u514b\uff0c\u6c42\u74f6\u7684\u5bb9\u79ef\u548c\u8d28\u91cf\u3002\uff08\u03c1\u7164=0.8\u00d7103Kg/m3\uff09
5\u3001\u7528\u540c\u4e00\u4e2a\u6728\u6a21\u505a\u6210\u7684\u4e24\u53ea\u94f8\u6a21\uff0c\u5206\u522b\u6d47\u94f8\u94dd\u952d\u548c\u94a2\u952d\u3002\u5df2\u77e5\u03c1\u94dd=2.7\u00d7103Kg/m3\uff0c\u03c1\u94a2=7.8\u00d7103Kg/m3\uff0c\u82e5\u94dd\u952d\u8d28\u91cf\u4e3a10.8\u5343\u514b\uff0c\u5219\u94a2\u952d\u8d28\u91cf\u4e3a\u591a\u5927\uff1f
\u4e94\u3001\u6837\u54c1\u95ee\u9898\uff1a
1\u3001\u67d0\u5de5\u5382\u94f8\u9020\u8f66\u95f4\u6709\u4e00\u4e2a\u673a\u5668\u96f6\u4ef6\u7684\u6728\u6a21\uff0c\u8d28\u91cf\u4e3a1.2\u5343\u514b\uff0c\u6728\u6750\u7684\u5bc6\u5ea6\u662f
0.6\u00d7103Kg/m3\uff0c\u73b0\u5728\u8981\u7528\u6b64\u6728\u6a21\u6d47\u94f8\u94dd\u94f8\u4ef630\u4e2a\uff0c\u81f3\u5c11\u8981\u7194\u5316\u591a\u5c11\u94dd\uff1f
\uff08\u03c1\u94dd=2.7\u00d7103Kg/m3\uff09
2\u3001\u4e00\u5757\u957f40\u5398\u7c73\uff0c\u5bbd10\u5398\u7c73\uff0c\u9ad85\u5398\u7c73\u7684\u6728\u6750\u7684\u8d28\u91cf\u662f1.08\u5343\u514b\uff0c\u52195\u7c733\u7684\u8fd9\u79cd\u6728\u6750\u91cd\u591a\u5c11\u725b\uff1f
二、已知水的密度是1克每立方厘米 0.1立方分米=100立方厘米
则0.9千克的水体积是1*900=900立方厘米 冰的密度就是900克/（100+900）=0.9克每立方厘米
三、铁球的密度是79/（75-60）=5.267克每立方厘米 小于7.8 所以不是实心的
铁球中铁的体积是79/7.8约等于10立方厘米所以空心不分的体积是15-10=5立方厘米
四、金属的体积=（90-10）/8=10立方厘米
装满液体时 液体的质量是40-10=30克 有液体有金属时液体的质量是100-80-10=10克
也就是说金属的体积是玻璃瓶体积的1/3 所以玻璃瓶的体积是3*10=30立方厘米
所以液体的密度=30克/30立方厘米=1克每立方厘米
1kg/m³=1 g/cm³ 1ml=1cm³
1、V=823-820=3
密度=质量/体积=50/3=16.67g/m³
小于 金的密度，所以不是
没带单位
2、V水=质量/密度=0.9/1000=0.9分米³ V冰=0.9分米³+0.1分米³=1分米³
冰的密度=质量/体积=0.9kg/1分米³=0.9X10³ kg/m³
3 V=质量/密度=79g/7.8g/cm³=10.1cm³
V=75-60-10.1=4.9cm³
1.V=823-820=3厘米³ P=m÷V=50g÷3厘米³≈16.7g/厘米³，然后再根据金的密度来判定该金属是不是纯金
2.物质的密度不会因为状态的改变而改变，不管是变成气态还是固态，水也是一样，密度还是10³kg/m³
3.①V=75ml-60ml=15ml=15厘米³ P=m÷V=79g÷15厘米³≈5.2g/厘米³=5.2×10³kg/m³＜7.8×10³kg/m³ 所以该铁球是空心的
②V实心=m÷P=79g÷7.8g/厘米³≈10厘米³ V空心=15厘米³-10厘米³=5厘米³
4.①m金=90g-10g=80g V=m÷P=80g÷8g/厘米³=10厘米³
②m只装液体时的液体=40g-10g=30g m装金属块时的液体=100g-90g=10g
m=30g-10g=20g p=m÷V=20g÷10厘米³=2g/厘米³
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绛旓細灏忕墿鍧楃殑璐ㄩ噺锛歮=800g-200g=600g 灏忕墿鍧楃殑浣撶Н锛歏=(500-200)cm^3=300cm^3 鎵浠瀵嗗害涓猴細蟻=m/V=600/300=2g/cm^3
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绛旓細(1)宸ヨ壓鍝佺殑瀵嗗害p锛滿 / V=600 / 52锛11.54 鍏 / 绔嬫柟鍘樼背 锛2锛夋寜鐓у敭璐у憳璇存硶锛屽惈閲戦噺涓50%锛屽嵆閲戠殑璐ㄩ噺鏄600*50%锛300鍏嬶紝閾滅殑璐ㄩ噺涔熸槸300鍏 姹傚緱閲戠殑浣撶Н鏄 V1锛滿閲/p閲戯紳300 / 19.3锛15.54绔嬫柟鍘樼背 閾滅殑浣撶Н鏄 V2锛滿閾 / p閾滐紳300 / 8.9锛33.71绔嬫柟鍘樼背 V1锛媀2锛15...
绛旓細瑙ｏ細瀵嗗害脳浣撶Н=璐ㄩ噺 璐ㄩ噺涓8.1kg鐨勯搮鐞冪殑浣撶Н搴斾负V=m/蟻=8.1/2.7脳10^3=3脳10^-3绔嬫柟绫=3绔嬫柟鍒嗙背 3<4.5, 鎵浠ラ搮鐞冧负绌哄績鐨勩傜┖蹇冮儴鍒嗙殑浣撶Н涓篤k=4.5-3=1.5锛堢珛鏂瑰垎绫筹級娉ㄦ弧娑蹭綋鍚庤川閲忓鍔爉z=9.6-8.1=1.5锛堝崈鍏嬶級娑蹭綋鐨勫瘑搴 蟻=m/v=1.5/1.5=1锛堝崈鍏/绔嬫柟鍒嗙背锛=1脳...
绛旓細V=Sh=1銕∶0.01mm=1脳10^-5m³ 瀵嗗害=m梅V=0.07kg梅V=700kg/m³
绛旓細1. 鍏勾绾涓嬪唽鐗╃悊瀵嗗害鐭ヨ瘑鐨勫簲鐢ㄥ皬 鍏勾绾т笅鍐岀墿鐞嗗瘑搴︾煡璇嗙殑搴旂敤灏 1.鍒濅簩涓嬪鏈熺墿鐞嗗瘑搴︾煡璇嗚繍鐢涔犻1.鏌愮澶х悊鐭崇殑瀵嗗害鏄2.7*103kg/m 1銆0.01 2.72銆5.25*10^4m^2(鏈鍚庡崟浣嶆槸涓嶆槸鎵撻敊浜,闈㈢Н)3銆丆,娌归兘姣旀按瀵嗗害灏4銆丄,閰掔簿浣撶Н鏄125ML5銆丆 鏁欏闈㈢Н鎬绘湁100m^2,楂樺害涔熻嚦灏2m鍚6銆丄,瀵嗗害鏈澶,浣...
