A sound wave of frequency of 2 kHz has a wavelength of 35 cm in a given medium. How long will it take to travel a distance of 2.1 km through the medium ?
To solve this, use the formula: Speed = Frequency × Wavelength. Here, Speed = 2 kHz × 35 cm = 700 m/s. The time to travel 2.1 km (2100 meters) is calculated as: Time = Distance/Speed = 2100 m / 700 m/s = 3 seconds.