这3道初二物理计算题怎么做？要有 详 细 步 骤 ！ 求解3道初二物理计算题 ，在线等···！！！
\u8fd9\u4e09\u9053\u6570\u5b66\u8ba1\u7b97\u9898\u600e\u4e48\u505a\uff0c\u8981\u8be6\u7ec6\u6b65\u9aa4\uff0c\u8c22\u8c22\u30101\u3011\u5c0f\u660e\u5916\u51fa\u65c5\u6e38\uff0c\u4e70\u4e86\u4e00\u53ea\u5b9c\u5174\u8336\u58f6\uff0c\u4ed6\u542c\u8bf4\u5b9c\u5174\u8336\u58f6\u662f\u7528\u5b9c\u5174\u7279\u6709\u7684\u6ce5\u571f\u6750\u6599\u5236\u6210\u7684\uff0c\u5f88\u60f3\u77e5\u9053\u8fd9\u79cd\u6750\u6599\u7684\u5bc6\u5ea6\u3002\u4e8e\u662f\u4ed6\u7528\u5929\u5e73\u6d4b\u51fa\u58f6\u76d6\u7684\u8d28\u91cf\u4e3a44.4g\uff0c\u518d\u628a\u58f6\u76d6\u653e\u5165\u88c5\u6ee1\u6c34\u7684\u6ea2\u6c34\u676f\u4e2d\uff0c\u5e76\u6d4b\u51fa\u6ea2\u51fa\u6c34\u7684\u8d28\u91cf\u4e3a14.8g\u3002
\u95ee\u98981\uff1a\u8fd9\u79cd\u6750\u6599\u7684\u5bc6\u5ea6\u662f\u591a\u5c11\uff1f\u3010\u8be6\u7ec6\u6b65\u9aa4\u3011
\u95ee\u98982\uff1a\u82e5\u6d4b\u5f97\u6574\u4e2a\u7a7a\u8336\u58f6\u3010\u4e0d\u542b\u58f6\u76d6\u3011\u7684\u8d28\u91cf\u4e3a159g\uff0c\u5219\u8be5\u8336\u58f6\u6240\u7528\u6750\u6599\u7684\u4f53\u79ef\u4e3a\u591a\u5927\uff1f\u3010\u8be6\u7ec6\u6b65\u9aa4\u3011
\u89e3\uff1a\uff081\uff09\u58f6\u76d6\u7684\u4f53\u79efV=m\u6c34/p\u6c34=14.8g/1g/cm^3=14.8cm^3
p\u76d6=m\u76d6/V=44.4g/14.8cm^3=3g/cm^3
(2)\u8be5\u8336\u58f6\u7684\u8d28\u91cfm=m1+m2=159g+44.4g=203.4g
V\u58f6=m/p\u76d6=203.4g/3g/cm^3=67.8cm^3
\u7b54\uff1a\u3002\u3002\u3002\u3002\u3002\u3002
\u30102\u3011\u6d77\u5b9d\u662f2010\u5e74\u4e16\u535a\u4f1a\u7684\u5409\u7965\u7269\u3002\u5728\u70b9\u7f00\u4e0a\u6d77\u8857\u5934\u7684\u5404\u79cd\u6d77\u5b9d\u4e2d\uff0c\u6709\u4e00\u5ea7\u6d77\u5b9d\u3010\u6750\u8d28\u5747\u5300\u3001\u5b9e\u5fc3\u3011\u7684\u8d28\u91cf\u4e3a3.0*10\u7684\u4e09\u6b21\u65b9kg\uff0c\u5bc6\u5ea6\u4e3a1.5*10\u7684\u4e09\u6b21\u65b9kg\u6bcf\u7acb\u65b9\u7c73\uff0c\u4e0e\u6c34\u5e73\u5730\u9762\u7684\u63a5\u89e6\u9762\u79ef\u4e3a1\u5e73\u65b9\u7c73\u3002
\u3010\u8bf7\u5199\u51fa\u89e3\u7b54\u8fc7\u7a0b\uff01\u3011
\u95ee\u98981\uff1a\u6c42\u5176\u4f53\u79efV
\u95ee\u98982\uff1a\u6c42\u91cd\u529b\u5927\u5c0fG\u3010g\u53d610/kg\u3011\uff1f
\u95ee\u98983\uff1a\u6c42\u5bf9\u5730\u9762\u7684\u538b\u5f3aP\uff1f
\u89e3\uff1a\uff081\uff09V=m/p=3.0*10^3kg/1.5*10^3kg/m^3=2m^3
(2)G=mg=3.0*10^3kg*10N/kg=3.0*10^4N
(3)P=F/S=G/S=3.0*10^4N/1m^2=3.0*10^4N/m^2
\u7b54\uff1a\u3002\u3002\u3002\u3002\u3002\u3002
\u30103\u3011\u4e00\u4e2a\u8d28\u91cf\u4e3a60kg\u7684\u6e38\u5ba2\uff0c\u8eba\u5728\u5bc6\u5ea6\u4e3a1.2*10\u7684\u4e09\u6b21\u65b9kg\u6bcf\u7acb\u65b9\u7c73\u7684\u6b7b\uff0c\u6d77\u6e56\u9762\u4e0a\uff0c\u4eba\u4f53\u7684\u5e73\u5747\u5bc6\u5ea6\u53ef\u8ba4\u4e3a\u7b49\u4e8e\u666e\u901a\u6e56\u6c34\u7684\u5bc6\u5ea6\uff0c\u5373\u4e3a1.0*10\u7684\u4e09\u6b21\u65b9kg\u6bcf\u7acb\u65b9\u7c73\uff0cg\u53d610/kg\u3002
\u3010\u8bf7\u5199\u51fa\u89e3\u7b54\u8fc7\u7a0b\uff01\u3011
\u95ee\u98981\uff1a\u6c42\u4eba\u6240\u53d7\u5230\u7684\u6d6e\u529b\u5927\u5c0f\uff1f
\u95ee\u98982\uff1a\u4eba\u9732\u5728\u6c34\u9762\u4e0a\u7684\u4f53\u79ef\u662f\u4eba\u4f53\u603b\u4f53\u79ef\u7684\u51e0\u5206\u4e4b\u51e0\uff1f
\u89e3\uff1a\uff081\uff09F\u6d6e=G=mg=60kg*10N/kg=600N
(2)F\u6d6e=pgV
V=F\u6d6e/pg=600N/(1.2*10^3kg/m^3*10N/kg)=0.05m^3
\u8fd9\u4f4d\u6e38\u5ba2\u7684\u4f53\u79efV\u6e38=m/p\u6e38=60kg/1.0*10^3kg/m^3=0.06m^3
0.05m^3/0.06m^3=5/6
\u5373\u516d\u5206\u4e4b\u4e94
\u7b54\uff1a\u3002\u3002\u3002\u3002\u3002\u3002
(2)F=(0.2+0.8)*10=10N
(3)P=F/S=10/0.01=1000PA
2.(1)重力G=mg=81.2*10=812kg
(2)密度=m/v=81.2/(0.02*0.02*0.07)=2900000千克每立方米
（3）最大压强P=812/（0.02*0.02）=2030000PA
1. V=m/p=0.8千克/(800千克/m3)=0.001m3
F=G=mg=(0.2千克+0.8千克)*10N/Kg=10N
P=F/S=10N/0.01m2=1000pa
2. G=mg=0.0812kg*10N/kg=0.812N
p=m/v=0.0812kg/(0.02m*0.02m*0.07m)=2900kg/m3
3. 将杯子开口向上竖直放入水中（水未进入杯中）
F浮=G=1000*10*(0.003*1/15)=2N
M=G/g=2N/10N/kg=0.2kg
F最大=1000*10*(0.003*0.15)=4.5N
1. V=m/p=0.8千克/(800千克/m3)=0.001m3
F=G=mg=(0.2千克+0.8千克)*10N/Kg=10N
P=F/S=10N/0.01m2=1000pa
2. G=mg=0.0812kg*10N/kg=0.812N
p=m/v=0.0812kg/(0.02m*0.02m*0.07m)=2900kg/m3
3. 将杯子开口向上竖直放入水中（水未进入杯中）
F浮=G=1000*10*(0.003*1/15)=2N
M=G/g=2N/10N/kg=0.2kg
F最大=1000*10*(0.003*0.15)=4.5N
这个答案还不错 就是有个缺点 楼主小心咯 有个地方是错的
绛旓細锛1锛夊綋寮鍏砈2銆丼3鏂紑鏃讹紝鐩稿綋浜庣數婧愬拰涓や釜鐢甸樆骞惰仈锛屾墍浠ョ數婧愮數鍘媢=0.6*(2+3)=3V (2)褰撳紑鍏砈1銆丼2銆丼3閮介棴鍚堟椂,绛夋晥鐢佃矾鍥惧鍥炬墍绀猴紝鐢垫祦琛ㄦ祦杩囩殑鐢垫祦1.5A涓虹數璺荤數娴侊紝鐢卞苟鑱旂數璺彲鐭ワ紝鐢甸樆R2鍜屽皬鐏场涓ょ鐨勭數鍘嬪潎涓虹數婧愮數鍘嬶紝涓3V锛屾墍浠ユ祦杩囩數闃籖2鐨勭數娴両2=3/3=1A,娴佽繃灏忕伅娉＄殑鐢垫祦...
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绛旓細绗竴棰橈細C 绗簩棰橈細1锛岀數椋庢墖锛屾礂琛ｆ満 鐢电倝 鐢垫殩姘 2锛岀煭璺紝鍔熺巼杩囧ぇ锛岀數娴侊紝妫鏌ョ數鐐夈佷笉鍚屾椂浣跨敤澶у姛鐜囩敤鐢靛櫒 3锛屾斁鐢 鐢电娉 鐢电娉 蹇 璁＄畻锛1锛岃В锛氣憼鐢变簬涓茶仈锛屾墍浠ュ悇涓湴鏂圭殑鐢垫祦鐩哥瓑I=I1=I2鈥︹︼紳I22=220mA 鈶＄敱浜庝覆鑱旓紝鎵浠ユ荤數鍘嬬瓑浜庡悇涓湴鏂圭數鍘嬩箣鍜 鍙堝洜涓哄皬鐏场瑙勬牸鐩稿悓锛...
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