15 Although monkeys have good eyesight they also have good
hearing and communicate
a great deal by sound in the
forest canopy. Why is this?

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

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?

The basic kind of life cycle found in the simplest animals is: haplontic or diplontic