What type of model is shown? a structural formula
a chemical formula
a space-filling model
a ball-and-stick model

How many cells are our body made of ? ♡

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?

In what part of the body does the most muscle activity happen?