Describe how the appearance of the blood drop changes depending on the surface it lands on.

When blood is impacted, droplets are dispersed through the air. When these droplets strike a surface, the shape of the stain changes depending on the angle of impact, velocity, distance travelled and type of surface impacted. ... As the angle of impact changes, so does the appearance of the resulting stain.

Explanation:

relationship between pressure and air volume and led to the understanding of how respiration works; i believe this is the correct answer ; /// good luck

steady state because it the only on that maes sense