tashakappler Posted February 18, 2016 Report Share Posted February 18, 2016 So I handed in my final IA draft today because it was our deadline for it, and something that just occurred to me now is that I used psi as a unit for air pressure inside a football (my experiment) and that may not be the right one to use. I went for psi because it was the most commonly used unit in all the sources I found on physics of a ball's rebound. I'm worried I just ****ed it up though. Also do I now have to change all my values for pressure so that's converted to Pa?? My teacher went over my IA and he didn't see anything wrong with it (and he's a harsh grader). What do I do???? Reply Link to post Share on other sites More sharing options...
kw0573 Posted February 18, 2016 Report Share Posted February 18, 2016 It's ok as long as all calculations are valid. For example if you use the gas constant that has units in atm then the calculation is not compatible. I think they can allow psi as a unit, just like mmHg is much easier to understand than pascal. Reply Link to post Share on other sites More sharing options...
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