Answers

2015-11-08T12:19:35+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
A. 
Elephant makes call at 20Hz.
Elephant calls in air.
speed of sound in air = 343 m/s

wavelength = speed/frequency = 343/20 = 17.15m

B. Bluewhale stays in water. Speed of sound in water is more than speed of sound in air. When blue whale calls at 20Hz, the wavelength of the call is 75m which is much higher than the wavelength of wave when it is called by elephant.
3 5 3