What is found in both viruses and in living single called organisms

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

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?

Adoença vitiligo afeta qual doença do corpo?