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OpenStudy (anonymous):
So, I am having trouble with this question: The heart has a pulse rate of 75 beats per minute which pumps about 70mL of blood per beat. Blood has a density of 1060kg/m^3. Circulating all of the blood in the body through the heart takes about 1 min in a person at rest. So the first question I got right, but the second one is where I get lost. "On average, what mass of blood (in grams) does the heart pump each beat?"
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