发布时间:2025-01-30 04:19:20
因为空气密度是1.29千克/立方米,所以体积630000立方米的空气质量就是630000×1.29=812700千克。
空气比热容是1×10³J/kg℃,所以需要热量就是Q=CmΔT=1000×812700×10=8127000000焦耳。
室内总水阀坏了,请问这种球阀坏了怎么更换,水管是什么材质,会不会在更换时弄坏
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