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b. Panjang gelombang = l/n = 3,75 / 2,5 = 1,75 m
c. T = t/n = 0,8 / 2,5 = 0,32 s
d. f = n/t = 2,5 / 0,8 = 3,125 Hz
e. v = lamda × f = 1,75 × 3,125 = 5,46875 m/s
f. Amplitudo = 30 cm
Maaf klo salah