QUESTION 3 Dolphins communicate through the emission and reception of sounds. A young dolphin was separated from its mother and started whistling at a frequency of 150 000 kHz to call her. The speed of sound in sea water is 1 480 m.s'. 3.1 Explain the term ultrasound 3.2 Calculate the wavelength of the young dolphin's whistle 3.3 3.4 .5 Another dolphin hears the distress call of the young dolphin 2s later how far apart are the two dolphins from each other? The speed of sound in air is 340 m.s.Briefly explain why the speed of sound in air is different from the speed of sound in seawater. Describe how dolphins use echolation to hunt their prey. ​