... D = 10 cos(2 A 16 cm B cm C 12 cm D 18 cm A 15 ,625 W B 15 6,25 W C D 36 mW A 1, 2 10 A B 1, 8 A C 1, 8 10 A D 2,4 A A 3,540 B 2,980 = 50 C 3,450 D 2,890 C 13 5 cm D 11 3 cm = u2 = Acos(40 A 10 5 ... : TANGGIAP.VN Trang 4/6 11 = A 25 Hz d1 = cm v B 50 Hz C 10 0 Hz D 75 Hz = 20 M M(t) = A cm B - cm = 10 -1 2 W/m2 A 83,45 dB C 82,53 dB C cm D - cm B 81, 25 dB D 79 ,12 dB 10 m/s2 A B s C s D 3 ... B 11 5 cm m/s2 A 1, 53 s A B 1, 42 s C 0,96 s D 1, 27 s B C D A Ngu : TANGGIAP.VN Trang 2/6 11 A 42 m/s B 30 m/s C 45 m/s D 60 m/s A 0,870 B 0,966 C 0,500 D 0,707 A 0 ,18 J B 0 ,16 J C 1, 6 mJ D 1, 8...