中學物理,噪音發出的功率跟距離的平方成正比。(距離減半功率增加4倍)
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• thanks for your respond -gamlastan- ♂ (170 bytes) () 04/25/2024 postreply 12:11:24
• thanks for your respond -gamlastan- ♂ (170 bytes) () 04/25/2024 postreply 12:11:24
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