Answer:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Explanation:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Hope this helps.
You should never re-enter a burning building for belongings, animals, or people. Firefighters do that for you.
Answer:
Explanation:
It is called Rally, Return or Smash
The answer is B: fat gives your body energy to function, while muscle mass is used only to perform strenuous activity. This option is only correct because the statement includes the words, "muscle mass." If it was only "muscle," then it would be wrong.
Answer:
Aerobic activities of an intensity at least six times that of resting (6 METs), commonly defined as activities with enough intensity to produce improvements in cardiovascular fitness.
Explanation:
