The universe has many different components. Place these 4 components of the universe in the most likely order from largest to smallest. (Planets, stars, galaxies, nebulae)

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

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 development of this new blg-free, hypoallergenic milk is based on a science that came to the forefront 150 years ago. what scientist's work provided the basis for such feats in biotechnology?