### Uncertainty Problem Help

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**Mon Sep 26, 2016 9:49 pm**In the fall workbook Fall 2015 quiz prep question 3 asks: Find the uncertainty in the position of a marble of mass 1.5g given that its speed is known to within + or - 0.55m/s. I used the uncertainty equation delta x= h/m*delta v and made sure to convert mass to kg and use 1.1 m/sec speed. I got a different answer from the answer key and wondering where I went wrong.