[bức tranh] [Kinh doanh trá»±c tuyến] [Thừa tá»±] [Lb *PPT��9 d�] [nguyễn văn linh hình học phẳng] [nuôi con khÃÆÃ] [Networking - Kỹ năng quan trọng nhất] [Bình nguyên Lá»™c] [flute player hears four beats per second when she compares her note to a fC = 523 Hz tuning fork (thenote C). She can match the frequency of the tuning fork by pulling out the tuning joint and lengthening thepipe of the flute slightly. What was the flute player’s initial frequency ff] [vạn sá»± bất cầu nhân]