SOLVED:If the contraction of the left ventricle of the heart lasts 250 \mathrm{ms} and the rate of flow of the blood in the aorta (the large artery leaving the heart) is 1.0 \mathrm{m} / \mathrm{s}, what is the average acceleration of a red blood cell as it leaves the heart? A. 250 \mathrm{m} / \mathrm{s}^{2} B. 25 \mathrm{m} / \mathrm{s}^{2} C. 40 \mathrm{m} / \mathrm{s}^{2} D. 4.0 \mathrm{m} / \mathrm{s}^{2}