Mose asked in Science & MathematicsPhysics · 9 years ago

what is the percent uncertainity implied by the numbers 1.1 and 9.9?

can someone show me how to do these kind of problms

3 Answers

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  • 9 years ago
    Favorite Answer

    If X = 1.1 it means X should be between 1.05 and 1.14999999999999999...

    Basically, the uncertainty is ± 0.05

    For example:

    - if X is 1.05 it would be rounded to 1.1

    - if X is 1.149 it would be rounded to 1.1

    but

    - if X is 1.04 it would be rounded to 1.0

    - if X is 1.15 it would be rounded to 1.2

    The %uncertainty for 1.1 is 100 x 0.05/1.1 = 4.5%

    The %uncertainty for 9.9 is 100 x 0.05/9.9 = 0.51%

  • ry0534
    Lv 6
    9 years ago

    You are not clear. But if this is a lab class, then the percent diff between observed and actual = |observed - actual| x 100 / actual

  • 9 years ago

    not too sure what you are asking, but.: how about :

    percent of uncertainity is: A. .9

    and B. .1

    hows that? good?

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