The displacement y of a particle in a medium can be expressed as
`y = 10^(-4) sin (10 t + 2x + pi//4)`
where all quantities are in SI units. Find the speed of the wave.

Explanation

To find the speed of the wave given the displacement equation \( y = 10^{-4} \sin(10t + 2x + \frac{\pi}{4}) \), we can follow these steps:

### Step 1: Identify the parameters from the wave equation
The standard form of a wave equation is:
\[ y = A \sin(\omega t + kx + \phi) \]
where:
...