An object's constant acceleration is south at 3.00 m/s2. at t = 0, its velocity is 30.0 m/s west. when will the magnitude of the velocity be 32.3 m/s?

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm