直径8,10,12,14,16毫米的钢筋,每米重量是多少啊?我算错了吗?0.008m×0.008m×3.1416×1m×7850kg/m^3=0.395kg/m那么轻?几年不看物理,居然这个都忘记了……惭愧
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/02 11:13:20
![直径8,10,12,14,16毫米的钢筋,每米重量是多少啊?我算错了吗?0.008m×0.008m×3.1416×1m×7850kg/m^3=0.395kg/m那么轻?几年不看物理,居然这个都忘记了……惭愧](/uploads/image/z/1753197-69-7.jpg?t=%E7%9B%B4%E5%BE%848%2C10%2C12%2C14%2C16%E6%AF%AB%E7%B1%B3%E7%9A%84%E9%92%A2%E7%AD%8B%2C%E6%AF%8F%E7%B1%B3%E9%87%8D%E9%87%8F%E6%98%AF%E5%A4%9A%E5%B0%91%E5%95%8A%3F%E6%88%91%E7%AE%97%E9%94%99%E4%BA%86%E5%90%97%3F0.008m%C3%970.008m%C3%973.1416%C3%971m%C3%977850kg%2Fm%5E3%3D0.395kg%2Fm%E9%82%A3%E4%B9%88%E8%BD%BB%3F%E5%87%A0%E5%B9%B4%E4%B8%8D%E7%9C%8B%E7%89%A9%E7%90%86%2C%E5%B1%85%E7%84%B6%E8%BF%99%E4%B8%AA%E9%83%BD%E5%BF%98%E8%AE%B0%E4%BA%86%E2%80%A6%E2%80%A6%E6%83%AD%E6%84%A7)
直径8,10,12,14,16毫米的钢筋,每米重量是多少啊?我算错了吗?0.008m×0.008m×3.1416×1m×7850kg/m^3=0.395kg/m那么轻?几年不看物理,居然这个都忘记了……惭愧
直径8,10,12,14,16毫米的钢筋,每米重量是多少啊?
我算错了吗?0.008m×0.008m×3.1416×1m×7850kg/m^3=0.395kg/m
那么轻?
几年不看物理,居然这个都忘记了……惭愧
直径8,10,12,14,16毫米的钢筋,每米重量是多少啊?我算错了吗?0.008m×0.008m×3.1416×1m×7850kg/m^3=0.395kg/m那么轻?几年不看物理,居然这个都忘记了……惭愧
楼主的算法是对的,8的钢筋是0.395公斤/米,10的是0.617公斤,12的是0.888公斤,14的是1.21公斤,16的是1.58公斤
错了!!!
(0.008m×0.008m×3.1416)/4×1m×7850kg/m^3=0.1kg/m
0.008m是直径。
S=3.1416*r^2=3.1416*d^2/4
直径8:0.395KG/m, 直径10:0.617
12:0.888, 14 :1.21 16:1.58
楼主的算法没错,可以查一查钢筋规格及理论重量表
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