September 2018 1 49 Report
Please bantu soal semester gwe
Kereta api bergerak meninggalkan stasiun dengan kecepatan 72 Km/jam,jika masinis
membunyikan pluit dengan frekuensi 900Hz dan cepat rambat bunyi di udara 340 m/s,
berapa frekuensi yg di dengar petugas stasiun..???
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