来源：学生作业帮 编辑：作业帮 分类：物理作业 时间：2024/07/17 18:52:45
1.2m/s=[ ]km/h 2.5m/s=[ ]km/h 30m/s=[ ]km/h 700m/s=[ ]km/h
1.2m/s=1.2×3600m/(1×3600s)=4320m/h=[4.32]km/h
2.5m/s=2.5×3600m/(1×3600s)=9000m/h=[ 9 ]km/h
30m/s=30×3600m/(1×3600s)=108000m/h=[108]km/s
700ms=700×3600m/(1×3600s)=2520000m/h=[2520]km/h
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