Answer:
Newton
Explanation:
Isaac Newton discovered this forces that keep the planets in their orbits
O2
N2
C
CO2
i think this is right but i'm not sure exactly what you're looking for
Answer:
Explanation:
can be observed and measured without changing composition (just say comp.), are used to observe and describe
Answer:
A low red blood count, or anemia, can cause feelings of fatigue and weakness. When a person has a lower red blood count than is normal, their body has to work harder to get enough oxygen to the cells. A low red blood cell (RBC) count can cause a variety of symptoms and health complications.
Explanation:
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