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  1. #1
    Offroad's Avatar
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    Default under 1 atm vs at 1 atm

    Dear teachers

    Which one of these read well?

    The data was taken at/under 1 atm(@psi).

    `Under` sounds better to me.

    Many thanks

    Offroad

  2. #2
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    Default Re: under 1 atm vs at 1 atm

    I don't know what it means but "at" and "under" mean two different things here. If the measurement was taken "at" 1 atm (whatever that means) then it's exactly "1". If it's "under" 1atm, then it's below 1 atm (so 0.99999 atm or lower).
    Remember - correct capitalisation, punctuation and spacing make posts much easier to read.

  3. #3
    Offroad's Avatar
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    Default Re: under 1 atm vs at 1 atm

    'At' it is then. 'Atm' is short for 'atmosphere', unit of pressure and equivalent to ~ 14.7 psi.

    Very much appreciated.

    Offroad

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