Are all cattle breeds the same species?

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

What nursing actions are part of the acute respiratory distress syndrome clinical network (ardsnet) protocol?