Cell is highly concentrated compared to blood
Observation the action or process of observing something or someone carefully or in order to gain information:
Answer: all of them
Explanation: I think they’re all true
Hope this helps!
Velocity is the speed of an object moving in a definite direction. The velocity of an object can be uniform or variable. When an object moving along a straight line at variable speed, we can Express the magnitude of its rate of motion in terms of average velocity.
Average velocity=Initial velocity+Final velocity/2
The SI unit of velocity is m/s.