Tolong yah sebisanya saja,bsk dikumpulin Mksh:)

1. a) f = n/t = 9000/ 300 = 30 Hz
b) T = 1/f = 1/30 s

2. T = 2 phi akar l/g
T = 2x 3,14 akar 0,9/10
T = 6,28 x 3/10
T = 1,88

3. a) lamda = s/n = 300/3 = 100m
b) v = lamda x f = 100 x n/t = 100 x 3/5 = 60m/s
c) frekuensi = n/t = 3/5 Hz