Question

A torsion balance has a sensitivity requirement (SR) of 6.0 mg. What is the MWQ of this balance if the maximum error permitted in using it is 4.2%? [round answer to a whole number]

Answer 1

MWQ is 143 mg

Explanation:

given data

sensitivity requirement (SR) = 6.0 mg

maximum error = 4.2%

to find out

MWQ

solution

we know here MWQ formula that is

MWQ =
`(sensitivity requirement)/(error)` ................1

so here error is 4.2 % = 0.042

put here all these value in equation 1 we get

MWQ =
`(sensitivity requirement)/(error)`

MWQ =
`(6)/(0.042)`

MWQ = 142.857 mg

so MWQ is 143 mg