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(4.1) [W.3) A harmonic travelling wave has wave function tx8 sin 153 The units of time and position, t and a, are seconds and metres, respectively, while the wave disturbance is measured in nanograms per cubic micrometre (a) Ascertain the ) amplitude, (ii) wavenumber. (ii) angular frequency (b) Determine () the speed with which propagates and (ü) whether it and (iv) phase of moves to the right or to the left.

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