The muscle tone of the along the colon contracts it lengthwise, causing its walls to bulge and form pouches called

What causes darkening of the skin as melanin production increases

The body of water found at number 4 on the map above is the

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?