The average speed of sound in ocean water is 1510 m/s. If a sound travels with a wavelength of 20 m, what is its frequency?*
0.01 Hz
75.5 Hz
30.2 MHz
30,200 Hz

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?