Which statement about wavelength, velocity, frequency or amplitude of a given wave equation is correct

1. A.
   of wavelength one metre
2. B.
   travelling with a velocity of 100 m/s in the negative $x$-direction
3. C.
   of frequency $\frac{100}{\pi}\ \text{Hz}$
4. D.
   travelling with a velocity of $50\pi\ \text{m/s}$ in the positive $x$-direction

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1. A.
   Wavelength $= 10\text{ }m$
2. B.
   Velocity $= 1.5\text{ }m/s$
3. C.
   Amplitude $= 3\text{ }cm$
4. D.
   Frequency $= 0.2\text{ }Hz$

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1. A.
   Velocity = $1.5$ m/s
2. B.
   Amplitude = $30$ cm
3. C.
   Wavelength = $10$ m
4. D.
   Frequency = $0.2$ Hz

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1. A.
   $y = \sin(x - 2t)$
2. B.
   $y = \sin(2\pi x - 2\pi t)$
3. C.
   $y = \sin(10\pi x - 20\pi t)$
4. D.
   $y = \sin(2\pi x + 2\pi t)$

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1. A.
   $\lambda = \dfrac{1}{6}\ \mathrm{m},\ v = 250\ \dfrac{\mathrm{m}}{\mathrm{s}}$
2. B.
   $a = 0.07\ \mathrm{m},\ v = 500\ \dfrac{\mathrm{m}}{\mathrm{s}}$
3. C.
   $n = 1500\ \mathrm{Hz},\ v = 200\ \dfrac{\mathrm{m}}{\mathrm{s}}$
4. D.
   $\lambda = \dfrac{1}{3}\ \mathrm{m},\ v = 500\ \dfrac{\mathrm{m}}{\mathrm{s}}$

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