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Introductory Physics Homework Help
Pressure of blood in an artery
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[QUOTE="axer, post: 6100660, member: 621757"] [h2]Homework Statement [/h2] [LIST=1] [*]The average pressure of the blood in a person’s arteries is 100 mmHg. What is the average pressure in an artery in the head of standing person 40 cm above the heart? [B](blood density= 1.05x103 kg/m3,Mercury density = 13.6x103 kg/m3 and g=10 m/s2)[/B] [/LIST] [h2]Homework Equations[/h2][h2]The Attempt at a Solution[/h2] it is clear that I have to include both 100 mmHg and the h= 0.4m to find Pressure at head artery. pressure heart=pressure head + pgh <-- hight of head 100x10^-3 x 10 x 13600= pressure head + (1059x10x0.4) pressure head= 3.2. this is wrong because the answer written is 9.09 x 103 N/m2. [U][B]Nevermind[/B] <-- [B]wrong calculations I divided instead of subtracting (don't know how to delete this post) :smile:[/B][/U] [/QUOTE]
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Pressure of blood in an artery
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