Question

hey Friends plz solve this..que

★Subtraction of two nearly equal quantities destroys the accuracy.COMMENT

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Answer 1

Hey User☺

✔This Is True. For Example when x =20.86 and Y=20.84 then
X-Y = 20.86-20.84 =0.02 has only one significant figure, whereas x,y both have four significant figure each.

★Hence It Is advisable to measure directly the Difference between two nearly equal quantities instead of measuring the quantities and calculating their Difference.

TQ

Answer 2

heya !!



please refer this attachment


Thanks !!