Jawabanmu

2014-06-01T08:07:05+07:00
T = 2 x phi x akar L/g
= 2 x 22/7 x akar 0,9/10
= 2 x 22/7 x 0,3
= 0,6 x 22/7
= 6/10 x 22/7

f = 1 / T
= 70/132 =
panjang gelombang = 0,9 m
cepat rambat = v
v = lambda x f
= 0,9 x 70/132
saya rasa kayak gini..maaf klo salah
2014-06-01T08:12:42+07:00
F=getar/waktu
 =90/15
 =6 Hz
t=1/f
  =1/6s
1,5 lamda =90
lamda=90/1,5
         =60cm
V=lamda x f
  =60 x 6
  =360 m/s

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