Answer:
According to the U.S. Energy Information Administration (EIA), in 2015 Wyoming, West Virginia, Kentucky, Illinois, and Pennsylvania produced about 639 million short tons (580 million metric tons) representing 71% of total U.S. coal production in the United States.
Explanation:
Answer: A helium balloon rises because helium is less dense than air. A balloon filled with regular air, however, is denser than the surrounding air because the air inside it is under pressure.
Explanation: i looked it up for you so i could make sure it was right for you hope this helps!!!!!!!!!!!
Answer:
Option B, Middle ear
Explanation:
Nasopharynx is the upper part of throat which lies behind the nose and it connects the to middle ear. It moves the mucus produced in the middle ear to the throat which is then further drained out.
This tube is responsible for equalizing the pressure inside the ear to the pressure outside the ear. It comprises upper throat and rear side of nasal cavity.
Hence, option B is correct
Carbondraytes (sorry if spelled wrong)
