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Given a wave f(x, t), we call period T the interval of time we need to wait before the form of the wave is repeated. Obviously, we must choose a constant x and observe the wave passing trough it.For exemple, for f(x, t) = ei(kx - wt) it's f(x, t + T) = ei(kx - w(t + T)), so that we have 0 = f(x, t + T) - f(x, t) = ei(kx - wt) (e-iwT - 1) → e-iwT = 1 → T = n 2π/w, with n element of Z. If we are considering two near peaks of f (that is a good way to define T) n = 1, and we have the famous T = 2π/w.
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40 weeks in a full term pregnancy
It means: O- oh M- my G- god W- what T- the F- f**k oh my god what the f**k
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W-T-F- - 2007 was released on: USA: 12 December 2007 (Los Angeles, California)
W T F? i don't understand what the hell you mean.
Party Girl - 2014 W-T-F- was released on: USA: 3 February 2014
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W. T. F. Bond has written: 'Design Project Planning' -- subject(s): Design, Industrial, Industrial Design
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Otto F. W. T. Griepenkerl has written: 'Letters on applied tactics' -- subject(s): Accessible book, Tactics