A stopwatch reading is written by two students as and

PHYSICS · Single correct · CBSE · Physics · Units and Measurements · Units and Measurements

Problem

A stopwatch reading is written by two students as

9.40\,\text{s}

and

9.4\,\text{s}

. Which statement correctly compares the precision conveyed by the two recordings? (a)

9.40\,\text{s}

is less precise because the trailing zero is not significant (b) Both readings have equal precision because the numerical value is the same (c)

9.40\,\text{s}

is more precise because it contains one additional significant figure (d)

9.4\,\text{s}

is more precise because it avoids possible rounding errors