What type of endoplasmic reticulum is involved in protein synthesis?

What does homeostasis means in biology?

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?

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?