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  1. #1
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    Default Who can explain Partial pressure to a Marine

    I teach for the MArines and have to teach PPo and law of absorbtion to a bunch of young marines. I know the laws but am having a hard time conveying it. ANy thought would be great and visual demonstrations.


  2. #2

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    Tell them a bunch of marines, and soldiers are pushing on a truck. You get partial push (pressure) from the soldiers, and the rest from the marines.


  3. #3
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    ha ha I would love to but I might loose my teaching quals


  4. #4

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    Alright, then football players, and wrestlers.


  5. #5
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    i need to explain it in depth such as gas toxcity increase into the body and surface area and volume and such


  6. #6
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    they get that the mixture of a gas is eual to the sum of its parts. But I need to relate that to the change in ppo at depth and how it relates to gas toxcicity


  7. #7
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    Quote Originally Posted by adam0321 View Post
    they get that the mixture of a gas is eual to the sum of its parts. But I need to relate that to the change in ppo at depth and how it relates to gas toxcicity
    Well, let me give it a try

    It is the difference between chugging a beer bong (at surface pressure) and filling the bong with Jose Quervo (at depth)
    One is not too bad, the other a killer.
    Even your run of the mill bootneck can relate to that.

    "Have you ever noticed
    When you're feeling really good
    There's always a pigeon
    That'll come shiat on your hood?" John Prine 4-7-2020

    "Into the blue again; in the silent water
    Under the rocks, and stones; there is water underground" Talking Heads

  8. #8
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    tru but then I have them thinking about libo and not about diving. thank you though. I have come up with the idea of using a seal a meal in class to show them how a bag(lungs) filled with marshmellows(gas) is full on the surface but at depth becomes compressed and therfore alowing more room for more marshmellows. and how at surface the preasure the marshmellow exerts on the bags(lungs) is not that great but how at depth they are pushing harder on the bag therfore becoming absorbed into the tissues more rapidly. this way I cover boyles.henerys,and daltons law all at once.

    I am having a hard time showing how 32% nitrox is .76ppo2 at 45' but 1.58ppo2 at 130'. so 32%on surface is like 132% at 100'(just an estimate not actualy doing the math) I can do the equation and show them but its hard to explain and visualize why it is


  9. #9
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    Quote Originally Posted by adam0321 View Post
    I teach for the MArines and have to teach PPo and law of absorbtion to a bunch of young marines. I know the laws but am having a hard time conveying it. ANy thought would be great and visual demonstrations.
    Why would you need to teach them differently than the general population, aka cave divers?

    As a former Marine, I found them to be intelligent people.


  10. #10
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    hmmm when were you in? We have some very inteligent people in our Corps but I am a firm believer that the class need to be tought to the lowest common dinominator



 

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