Question

3. When a blood drop lands on a surface at a 90 degree angle, what shape is the drop in typically?

Answer 1

spherical shape

Step-by-step explanation:

Left: passive bloodstains. Right: bloody shoe print transfer pattern. Because blood demonstrates surface tension, or cohesive forces that act like an outer skin, a drop of blood dropped at a 90° angle forms a near-‐perfect spherical shape.