Question
Asked Nov 14, 2019
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A physician judges the health of a heart by measuring the pressure with which it pumps blood.
 
 
 

Part A

If the physician mistakenly attaches the pressurized cuff around a standing patient's calf (about 0.82 m below the heart) instead of the arm (Figure 1), what error (in Pa) would be introduced in the heart's blood pressure measurement?
Express your answer using two significant figures.
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Expert Answer

Step 1

The average density ρ of blood is known to be 1060 kg/m3

The difference in height Δh is given as 0.70 m

The error in the measurement of pressure is calculated as,

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AP pgAh

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Step 2

Here g is the acceleration due to gravity.

Substitute 9.8 m/s2 for g, 1060 kg/m3 for ρ, 0.70 m for &D...

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AP (1060kg/m2(9.8m/s2)(0.70m) 7271.6Pa

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