物理第三题,感激不尽
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物理第三题,感激不尽
![](http://img.wesiedu.com/upload/9/1d/91d3542623031c4793e2f2c8c1275352.jpg)
![](http://img.wesiedu.com/upload/9/1d/91d3542623031c4793e2f2c8c1275352.jpg)
![物理第三题,感激不尽](/uploads/image/z/19259645-5-5.jpg?t=%E7%89%A9%E7%90%86%E7%AC%AC%E4%B8%89%E9%A2%98%2C%E6%84%9F%E6%BF%80%E4%B8%8D%E5%B0%BD%26nbsp%3B)
解;假设这个球是实心的,则质量是1.58kg铁球的体积应为
V实=
mρ
=
1.58kg7.9×103kg/m3
=0.2×10-3m3=0.2dm3<0.24dm3;
∴为空心
V空=V球-V实=0.24dm3-0.2dm3=0.04dm3
0.04×1000×1=40g=0.04kg
0.04+1.58=1.62
答案是1.62
V实=
mρ
=
1.58kg7.9×103kg/m3
=0.2×10-3m3=0.2dm3<0.24dm3;
∴为空心
V空=V球-V实=0.24dm3-0.2dm3=0.04dm3
0.04×1000×1=40g=0.04kg
0.04+1.58=1.62
答案是1.62