Problem 4: Heart MechanicsThe human heart is a pump. Assume an average person with 5.3 L of blood, which has a specificgravity of 1.060 and a dynamic viscosity 3 times that of water. Assume a temperature of 35°C, aresting pulse of 90 beats/minute, heart discharge of 5.0 L/min, and head change of 35 mm Hg.By the way, that head change corresponds to a blood pressure of "105-over-70", which meansthe high pressure is 105 mm Hg, and the low pressure is 70 mm Hg, giving AH = 35 mm Hg.Part AWhat is the power delivered to the blood by the heart? [W]Part BIf the power required by the heart is 2.0 W, what is the heart's efficiency? [-]Part CWhat is the heart's daily energy requirement? [kJ]Part DConvert the units from [kJ] to [number of milk shakes]. 4.2 kJ = 1 food calorie, and assume a16 oz Strawberry Triple Thick Shake containing 560 food calories.

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Engineering

Mechanical Engineering

of 1.060 and a dynamic pulse of 90 beats/minute,

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Problem 4: Heart Mechanics
The human heart is a pump. Assume an average person with 5.3 L of blood, which has a specific
gravity of 1.060 and a dynamic viscosity 3 times that of water. Assume a temperature of 35°C, a
resting pulse of 90 beats/minute, heart discharge of 5.0 L/min, and head change of 35 mm Hg.
By the way, that head change corresponds to a blood pressure of "105-over-70", which means
the high pressure is 105 mm Hg, and the low pressure is 70 mm Hg, giving AH = 35 mm Hg.
Part A
What is the power delivered to the blood by the heart? [W]
Part B
If the power required by the heart is 2.0 W, what is the heart's efficiency? [-]
Part C
What is the heart's daily energy requirement? [kJ]
Part D
Convert the units from [kJ] to [number of milk shakes]. 4.2 kJ = 1 food calorie, and assume a
16 oz Strawberry Triple Thick Shake containing 560 food calories.

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