Calculate the average amount of power that the heart delivers

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Homework Help Overview

The discussion revolves around calculating the average power delivered by the human heart during a heartbeat, given the pressure in the arteries and the volume of blood pumped. The subject area includes concepts from physiology and physics, particularly relating to work and energy in the context of fluid dynamics.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants are attempting to relate pressure, force, and displacement to calculate energy and subsequently power. There is uncertainty about how to interpret displacement in this context and how to apply the pressure value to find energy.

Discussion Status

The discussion is ongoing, with participants expressing confusion about the concepts of displacement and how to proceed with the calculations. Some guidance has been offered regarding the relationships between pressure, force, and work, but there is no consensus on the next steps.

Contextual Notes

Participants mention challenges with translation and understanding specific terms, which may affect their ability to engage with the problem fully. There is an emphasis on not wanting complete solutions, indicating a desire to learn through the discussion.

Hangst
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Homework Statement



When a human heart during a heartbeat pulls together the overpressure in the outwardgoing arteries is about 16 kPa. Every minute the heart drives 5 liters of blood around in the bloodstream.

Calculate the average amount of power that the heart delivers

Homework Equations





The Attempt at a Solution



I'm not entirely sure how to tackle this question. I'm trying to figure out the energy as power is energy pr. time. Also, I'm not entirely sure what to do with the pressure, I'm thinking I have to convert it into something to do with energy. Sorry about the poor translation but that is as best as I can do. I'd appreciate some help but not the actual question done so I can attempt it myself.
 
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Energy = Work = Force x displacement

Force = Pressure x Area

Area x Displacement = ?
 
Dickfore said:
Energy = Work = Force x displacement

Force = Pressure x Area

Area x Displacement = ?

Not sure what you mean by displacement. Lost in translation I guess :l
 
Hangst said:
Not sure what you mean by displacement. Lost in translation I guess :l

How far the blood travels or? And I'm not sure how I'm supposed to use this.
 
Dickfore said:
Energy = Work = Force x displacement

Force = Pressure x Area

Area x Displacement = ?

Perhaps you could show me what to do, and maybe I will understand it then?
 

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