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October 02, 2025, 05:26:43 am
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Author Topic: Metabolic Rate  (Read 1922 times)  Share 

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Studyinghard

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Metabolic Rate
« on: April 12, 2011, 05:28:07 pm »
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A person is breathing air at sea level. As a result of metabolism the air expired has 13% oxygen (compared to 21% for air inspired). If the person breathes a total volume of 3.3 litre of air per minute, what is the person's metabolic rate, in watt?

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Studyinghard

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Re: Metabolic Rate
« Reply #1 on: April 12, 2011, 05:56:24 pm »
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1l of oxygen = 20.2 KJ if that helps.

I got 18.5 w but dont know if thats right
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schnappy

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Re: Metabolic Rate
« Reply #2 on: April 12, 2011, 06:32:30 pm »
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Quote from: Studyinghard on April 12, 2011, 05:56:24 pm
1l of oxygen = 20.2 KJ if that helps.

Yeah, makes it possible :P

3.3l of O_2 ---> 66.66kJ
P=(66.66*1000)J/(60)s
P=1111 W

Not sure what the go is with this 21% air inspired though? I'm assuming the metabolic rate is the energy/time of oxygen intake, where the amount of oxygen is 13% of the 3.3l.
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