Chemistry

How do we add,subtract,multiply or divide the uncertainities of two values? For example
28.0 +- 0.5 and 0.899 +- 0.003
Actually i have to solve this question
[log{sq.rt. of (0.104 +- 0.006)}/ (.0511 +- 0.0009)]?
Hope u get the question in what manner its written.

  1. ๐Ÿ‘ 0
  2. ๐Ÿ‘Ž 0
  3. ๐Ÿ‘ 46
asked by Jimmy
  1. When adding or subtracting terms with random error estimates, take the square root of the sum of the squares (RSS) as the probably error of the result.

    When multiplying or dividing terms with error estimates, take the square root of the sum of the squares (RSS) of the RELATIVE errors as the relative error of the result.

    In your example, the natural log of sqrt (0.104 +- 0.006) is -1.13 (+-3%). The relative error of the denominator is .0009/.0511 = +-0.18%

    The relative error of the result is about +- 3%

    That would make it -22.1 +- 0.7

    1. ๐Ÿ‘ 0
    2. ๐Ÿ‘Ž 0
    posted by drwls

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    Jen, I will attempt to write the others out. #3)ADD: -57 + (-22) I got -79 #4)Subtract -2.3-(-8.8) I got -6.5 #7)perform indicated operation: -21 - (-9) I tried to underline ----------- -21 - (-21) I got -12 over o or undfined

    asked by barbara on July 18, 2010
  2. math

    Name: Barbara Dillon Date: July 18 2010 1. Divide 90รท18 =5 Answer is 5 2. Place the following set of numbers in ascending order. 22, โ€“7, 8, โ€“4, 12, โ€“1, 14 Ascending order : -7, -4, -1, 8, 14, 22 3. Add 4. Subtract 5. Divide

    asked by barbara on July 18, 2010
  3. Math

    Put these operations in order. The operations with the greatest impact should go on the top level. (Add, Subtract, Multiply, Divide) Top Level-Multiply and Add Least Impact-Divide and Subtract Multiply, Add, Divide , Subtract-Is

    asked by Patrick on September 1, 2018
  4. Hi need help with math

    I need help plz 1Star circle heart is The pattern what is the 17 shape Star* Circle Heart 2 add subtract multiply divide what is the 100 shape Add Multiply* Divide Subtract

    asked by Essence loves math on March 31, 2016
  5. math

    kelly solved the following problem on her recent math test 121/11+4*8=120 the answer was marked wrong by your teacher and kelly is asking you to explain why she missed the promblem.whicthsolutions would you tell her A.divide 121

    asked by jamia on September 2, 2009
  6. algebra

    I need a step by step explanation on how to add these two equations 2x+3y=1 5x+3y=16 Subtract the first equation from the second. (Subtract left and right sides separately). This gives you 3x = 15 Then divide both sides by 3. x =

    asked by Tony on March 20, 2007
  7. algebra

    Write the expression for each of the following: a]add 9 to y b]subtract p from 15 b]divide m by 3 d]multiply 4 by g e]subtract 12 from 8a f]find the sum of 5 and 9 2

    asked by fatimah on September 25, 2017
  8. Algebra

    Which of the following describes a correct method for solving the equation below? -7/2n + 5 = -16 1. add 5 to both sides, then divide both sides by 2/7 2. subtract 5 from both sides, then multiply both sides by -7/2 3. add -5 to

    asked by Anon on December 15, 2015
  9. Algebra

    When multiplying two numbers written in scientific notation what do you do with the exponents of the 10? A. multiply B. add C. subtract D. divide I think the answer is A. multiply. Is that correct?

    asked by Madison on May 4, 2016
  10. Math-please help!!

    Make a word document with the key points (in tables/charts) for the following functions, given in the form y=asink(x+d)+c Start with multiplication/division (multiply โ€˜yโ€™ by a, divide โ€˜xโ€™ by k) Then add c to the y values,

    asked by Kate on July 19, 2011

More Similar Questions