A baby cries with a frequency 712 Hz, if the speed of sound in air is 356m/s, the wavelength of sound is:
5 m
0.005 m
0.05m
0.5 m
A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms−1. The apparent change in the wavelength of sound heard by the observer is (speed of sound in air = 340 ms−1)
A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength of (a) the reflected sound, (b) the transmitted sound? Speed of sound in air is 340 m s–1 and in water 1486 m s–1.