Does any one know how to evaluate scientific design?

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

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?

What type of pollution does household garbage cause