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Homework Help: Pressure units

  1. Jun 13, 2007 #1
    1. The problem statement, all variables and given/known data
    Which of the following definitions or units apply to pressure?
    True False Newtons per square meter
    True False kg per cubic meter
    True False pascals
    True False force per unit area
    True False mass per unit volume

    3. The attempt at a solution
    My answers are in bold, says my answers are wrong, anyone know what im doing wrong, from what i found in my text book i got these answers.
  2. jcsd
  3. Jun 13, 2007 #2
    I am not sure if this is helpful for everyone or not, but consider the logic I often use when determining which units are indicative of pressure. That logic is as follows:

    A typical unit of pressure in the USA is psi (pounds per square inch). I know pounds is a measure of force (not mass) and a square inch is a measure of area. Thus, pressure units must carry the form of force per area.

    I hope this helps.

  4. Jun 13, 2007 #3
    Well when u put it like that it all makes sense, Thanks got the right answer:smile:
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