- #1
simond
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Homework Statement
You measure the mass of a physics textbook to be 2.97±0.07 kg, and use this value to estimate the total mass of 800 identical physics textbooks in the bookstore. What is the absolute uncertainty in your estimate of the total mass?
I have been working on this for a while. I am not sure why I cannot get it. What I have tried is:
0.07(2)=0.014 -- since the uncertainty can go up or down .07kg
then, multiplying the 0.014 by the 800 textbooks, to get 11.2kg.
This however apparently is incorrect. What should I do?