Chemistry

When finding uncertainties in measurements, I know that if you are adding or subtracting, you must add the uncertainties of the two values. But what do I do if I multiply/divide?

  1. 👍 0
  2. 👎 0
  3. 👁 150
asked by L
  1. If X=A*B or X=A/B, then the uncertainty in X is:

    X*sqrt( ((uncertainty in A)/A)^2 + ((uncertainty in B/B))^2 )

    1. 👍 0
    2. 👎 0
  2. I'm not entirely sure what you mean, but after a thorough search through notes I think I might get it... correct me if I'm wrong?

    I need to use relative uncertainties, and then use the relative uncertainty to find the uncertainty?

    (I know how to do both of those, I just want to make sure that that is what I'm supposed to be doing.)

    Thanks

    1. 👍 0
    2. 👎 0
    posted by L
  3. Yes, since the uncertainty of a product or quotient of two values depends on the uncertainty of each of those two values. (The more uncertain the values, the more uncertain the product or quotient of those values.)

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    How is adding and subtracting mixed numbers similar to adding and subtracting fractions? How is adding and subtracting mixed numbers different than adding and subtracting fractions? Give examples to explain your answer.

    asked by Rap god on February 25, 2018
  2. Math

    Explain It How is adding and subtracting with money like adding and subtracting whole numbers?

    asked by Quan on May 13, 2013
  3. Physics

    1. The Following instruments are available in your laboratory. What would be the absolute uncertainties in the measurements made with these instruments? A. Ruler B. Protractor C. Watch D. Scale 2. By using the instruments from the

    asked by Alessandra Romano on September 5, 2015
  4. Algebra Help!!

    How is adding and subtracting radicals the same as adding and subtracting polynomials?

    asked by grace on October 14, 2017
  5. math

    how to subtract numbers with decimals Line up the decimal points and proceed the same way as you would when subtracting whole numbers. Example: 56.78 12.34 ____ 44.44 It works the same when adding decimalized numbers. example:

    asked by tyler on August 30, 2005
  6. pre-calculus 11

    -x/(x-3) + 2x/(x+2) (x-1) x (x-2) (x+2)/(x-3)(x-3) my question is should i multiply first and then do the adding or subtracting through a LCD or should i do the adding first?

    asked by george on June 16, 2015
  7. physics for Science

    2) You take the following measurements for the distance a toy car travels in 10 seconds during each 5 trials: 157cm, 175cm, 162cm, 168cm, 187cm. What are the relative uncertainties of the distance and time measurements? Which

    asked by Alessandra Romano on September 6, 2015
  8. computer science

    I have a project due May 17. I have to create a math game using a GUI/Menu. The game has to give the user the option to chosse between which subject they would like to work on: adding, subtracting, dividing, multiplying integers;

    asked by Carlissa on May 16, 2011
  9. conjectures

    Evaluate the following sums: 1 1+8 1+8+27 1+8+27+64 Add two more line to the list, and make a conjecture about the sums you obtained. this is a pattern. if you look closely than you'll see each number is a product of another

    asked by Shay on February 25, 2007
  10. math

    Why is it important to simplify radical expressions before adding or subtracting? How is adding radical expressions similar to adding polynomial expressions? How is it different?

    asked by pat on October 26, 2008

More Similar Questions