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Where should length measurement begin on a ruler?

Answer and explanation

Correct answer: From the zero mark

To measure length, one end of the object is placed at the zero mark of the ruler and the reading at the other end is noted. Therefore, the zero mark is correct. Starting directly from a middle or last mark will not give the length unless the difference between the two readings is calculated. Exam tip: If the zero edge of a ruler is damaged, start from a clear mark and subtract the initial reading from the final reading.

Related tags

Length MeasurementRulerZero MarkMeasurement AccuracyScience PracticalMeasurement And Scientific UnitsExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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