λ=20 м T=2 c V=? v=?
===
V=λ/T=20/2=10 м/с
v=1/T=1/2=0.5 Гц
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λ=20 м T=2 c V=? v=?
===
V=λ/T=20/2=10 м/с
v=1/T=1/2=0.5 Гц
=======================