40mm无缝钢管理论重量
40mm无缝钢管理论重量
每米的重量
每米的重量
物理人气:914 ℃时间:2020-04-04 20:12:23
优质解答
找个量筒来‘‘‘取50ML的水```把钢管放进去``测出体积(V)``然后弄个天平来(先调平)``测出质量(M)```然后根据密度公式求密度```再用密度公式求每米的重量
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