Characteristics of Sound Waves
- Wavelength ($\lambda$), Frequency ($\nu$), Speed ($v$):
$$v = \lambda \nu$$
- Echo Calculation: Minimum distance to hear a distinct echo at $22^\circ\text{C}$ ($v = 344\text{ m/s}$):
$$d = \frac{v \times t}{2} = \frac{344 \times 0.1}{2} = 17.2\text{ meters}$$
