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Ratio question: gas laws

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    see attachment for Q:

    I have added all relevant information including MS answer....I just wanted to check why they are correct....is it because pV=constant (at a constant temperature - this was an assumption we were told to make).
    As L (length) is a proportional to volume we can say P*L = constant

    is this correct?
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    Yes, because volume is L x cross section (A) and the cross section is the same.
    If pV is constant then
    pLA = constant

    If A is constant
    pL = (a different) constant
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    ReputationRep:
    (Original post by Stonebridge)
    Yes, because volume is L x cross section (A) and the cross section is the same.
    If pV is constant then
    pLA = constant

    If A is constant
    pL = (a different) constant
    thats a really good way to see it (using A)

    thanks

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