What is the Average Power Output of a Human Heart Pump?

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Homework Help Overview

The discussion revolves around calculating the average power output of a human heart pump based on the kinetic energy of blood being pumped during a heartbeat. The problem involves understanding the relationship between kinetic energy and power in the context of human physiology.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants are attempting to calculate kinetic energy and relate it to the power output of the heart. Questions are raised about the specifics of the kinetic energy calculation and its relevance to the overall power output.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the calculations and the relationship between kinetic energy and power. Some guidance has been offered regarding the need for clear units and definitions of the quantities involved.

Contextual Notes

There is a mention of the need for dimensional consistency in the calculations, as well as uncertainty about the correctness of the initial energy computation. Participants are exploring the assumptions behind the problem setup.

Annika
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Homework Statement



during a human heart beat, 20g of blood are pushed into the main arteries. This blood is accelerated from a speed of 0.20ms-1 to 0.34ms-1. For a heart pulsing at 70 beats per minute, calculate the average power of the heart pump.

Homework Equations


KE=1/2mv2

The Attempt at a Solution


I worked out that the kentic energy is 0.196 but idk of that is correct [/B]
 
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The kinetic energy of what? How do you relate it to the power of the heart?
 
Orodruin said:
The kinetic energy of what? How do you relate it to the power of the heart?
I'm not sure I think it's the KE of the blood
 
Show how you calculate that, please

Oh, and: welcome to PF :)
 
If you are not sure of what you have computed, how are we going to be able to tell you whether it is correct or has anything to do with what you are seeking? Also, you have also given a number. Energy is a dimensional quantity and you need to specify a unit. The question that remains is: What are you computing, how are you doing it, and why do you think it is related to the solution?
 

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