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Lisa [10]
2 years ago
15

A torsion balance has a sensitivity requirement (SR) of 4.5 mg. What is the MWQ of this balance if the maximum error permitted i

n using it is 3.6%?
Chemistry
1 answer:
dybincka [34]2 years ago
7 0

Explanation:

MWQ means the minimum weighable quantity.

Mathematically,         MWQ = \frac{Sensitivity}{1 - \text{fraction of accuracy}}

or,        MWQ = \frac{sensitivity}{\text{fractional error}}

It is given that sensitivity is 4.5 mg and maximum permitted error is 3.6%.

Therefore, fraction error = \frac{3.6}{100} = 0.036

Hence, we will calculate MWQ as follows.

                  MWQ = \frac{sensitivity}{\text{fractional error}}

                            = \frac{4.5 mg}{0.036}

                            = 125 mg

Thus, we can conclude that the MWQ of the given balance is 125 mg.

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