Error Calculation: 1/a with Error

In summary, the conversation discusses finding the error for the value of 1/a, given the value and error of a, using the rules for combining errors and powers of a value. The rule for combining errors is ΔZ = Z√((ΔX/X)^2 + (ΔY/Y)^2), while the rule for powers of a value is ΔZ = nx^(n-1)ΔX. The individual attempting the solution tried using 1/a ± 1/error, but found that the error became too large. The expert suggests using the aforementioned rules to calculate the error for 1/a. The individual is asked to provide their calculations to show why their error result is considered too large.
  • #1
jmher0403
22
0

Homework Statement



a = 0.00083 ± 0.00002m

what is 1/a with error

Homework Equations



rules for combining errors

z = xy or z=x/y σ(z) = [σ(x)]2[σ(y)]2

The Attempt at a Solution



I tried doing 1/a ± 1/error

but the error gets too big... is there a rule for this kind of situation?
 
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  • #2
jmher0403 said:

Homework Statement



a = 0.00083 ± 0.00002m

what is 1/a with error


Homework Equations



rules for combining errors

z = xy or z=x/y σ(z) = [σ(x)]2[σ(y)]2


The Attempt at a Solution



I tried doing 1/a ± 1/error

but the error gets too big... is there a rule for this kind of situation?

The rule for Z = X*Y or Z = X/Y is
$$\Delta Z = Z\sqrt{\left(\frac{\Delta X}{X}\right)^2 + \left(\frac{\Delta Y}{Y}\right)^2}$$
A rule for powers of a value:

If ##Z = X^n## then
$$\Delta Z = n x^{(n - 1)} \Delta X$$
In your case n = -1.

Can you present your calculations showing that your error result is too large? (and too large as compared to what?)
 

What is "Error Calculation: 1/a with Error"?

"Error Calculation: 1/a with Error" is a method used to calculate the uncertainty or error associated with the inverse of a measured value, where "a" is the measured value and "1/a" is the calculated value.

Why is "Error Calculation: 1/a with Error" important?

"Error Calculation: 1/a with Error" is important because it allows for a more accurate representation of the true value of a measurement, taking into account the uncertainty or error associated with the measurement. This is crucial in scientific experiments and calculations, as it helps to ensure the reliability and validity of the results.

How is "Error Calculation: 1/a with Error" performed?

"Error Calculation: 1/a with Error" is performed by using a formula that takes into account the measured value, its uncertainty, and the mathematical relationship between the measured value and the calculated value (in this case, the inverse). This formula is known as the "error propagation formula" and is based on the principles of calculus and statistics.

Can "Error Calculation: 1/a with Error" be applied to any measurement?

Yes, "Error Calculation: 1/a with Error" can be applied to any measurement where there is a mathematical relationship between the measured value and the calculated value. However, it is important to note that the accuracy of the calculated error will depend on the accuracy and precision of the measured value and the appropriate use of the error propagation formula.

Are there any limitations to "Error Calculation: 1/a with Error"?

Yes, there are some limitations to "Error Calculation: 1/a with Error". One limitation is that it assumes the uncertainty in the measured value is normally distributed. Additionally, it may not accurately account for systematic errors or errors due to external factors. It is important to use good experimental design and appropriate statistical analysis to minimize these limitations.

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