CCEA GCE Life & Health Sciences Practice Questions - CCEA GCE Life And Health Sciences (Northern Ireland) Exam

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A student measures mass on a balance that reads to 0.01 g. Which statement best describes the precision of a single reading of 12.40 g?

The true mass must be exactly 12.40 g The reading is reported to the nearest 0.01 g, so precision is limited by the instrument resolution Precision is unlimited because digital balances never have uncertainty The value is accurate to ±1 g regardless of the display

Correct Answer:

The reading is reported to the nearest 0.01 g, so precision is limited by the instrument resolution

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