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Which one is heavier and why?

  1. Jan 2, 2009 #1
    you have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. in reality, one is heavier than the other. can you say which one is heavier and why?
     
  2. jcsd
  3. Jan 2, 2009 #2
    Re: heavy

    Is there an atmosphere permeating the weighing machine?
     
  4. Jan 2, 2009 #3
    Re: heavy

    "can you say which one is heavier and why? "

    If I were using a NIST traceable weighing machine, I'd use the standard correction for the effect you're thinking of and neither would be heavier.
     
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