Physics

Problem

A sinusoidal wave travels along a wire with speed

320\,\text{m\,s}^{-1}

and frequency

40\,\text{Hz}

. What is the phase difference between two points that are

2.0\,\text{m}

apart along the wire? a)

\pi

\dfrac{\pi}{4}

\dfrac{\pi}{2}

\dfrac{3\pi}{2}