Air conditioners have filters. What are they
used to separate and how do they work?

Explanation:

there are three different filters

captures particles as small as 0.3 microns

captures medium sized particles and absorbs gaseous contaminants

captures large dust bunnies, large pollen, pet and human hair and helps preserve charcoal and HEPA filters

hope this helps :)

idk

explanation:

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."