2023 · Q34
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?
general-sciencephysics-mechanics
- A30 s
- B2.1 s
- C3.0 s
- D4.1 s
Explanation
The wave speed is v = frequency x wavelength = 2000 Hz x 0.35 m = 700 m/s. The time to travel 2.1 km is distance/speed = 2100/700 = 3.0 seconds. Hence option C.