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
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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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