The heart has structures that are called. This allows the blood to move in one direction.
A. Valves
B. Veins
C. Atrium
D. Capillaries

What is the mass of the same rock on the earth

Use the information presented in the graph to answer the questions. which segments show acceleration? which segment indicates that the object is slowing down? what is the velocity of segment b? what is the acceleration of segment b?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island