10. t= 1.2s
lamda= 120cm dijadikan m = 1.2
v?
v= lamda÷t
v= 1.2÷1.2 = 1m/s (A)
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10. t= 1.2s
lamda= 120cm dijadikan m = 1.2
v?
v= lamda÷t
v= 1.2÷1.2 = 1m/s (A)