Four students use different instruments to measure the length of the same pen. Which measurement implies the greatest precision?

a. 16.0 cm.

b. 0.160 m.

c. 0.00016 km.

d. Need more information.

e. 160.0 mm

e. 160.0 mm

Explanation:

Precision is defined as the accuracy in measurement that the measuring instrument measure any given specimen. The instrument having the lowest least count will be more precise than the instrument with higher least count.

Also precision of the reading is given by the number of the significant figures in the given sample of reading.

Option (e) that is 160.0 has a total number of significant figure of 4, which is the largest total significant figures among the other options.

Also the measurement reads 160.0 mm which measure to the lowest possible measurement of the given pen. Thus this reading is more precise.

Hence the correct option is - - - Option (e) 160.0 mm