Thursday, 30 November 2017

Error propagation rounding



hope I am right in this section.



I am unsure with error propagation. When calculation the error in a titration, many errors has to be taken into account:


Error in Glassware/ Error in Balance/ Error in Burette etc.


I learned that the absolute and relative error have only 1 significant figure and that the total amount is rounded to the decimal place of the error.


Therefore 5.34532g ± 0.001428g would be 5.345g ± 0.001g


The relative error is 0.001g/5.345g = 0.00018709 = 0.0002 If there is an experiment with a lot of steps and error propagation wouldn't the rounding of all the errors in every single step change the result a lot? Wouldn't rounding the error just in the end make more sense?


Many thanks in advance.




No comments:

Post a Comment

Understanding Stagnation point in pitot fluid

What is stagnation point in fluid mechanics. At the open end of the pitot tube the velocity of the fluid becomes zero.But that should result...