Question

section 1.4

1. a meter stick with millimeters as its smallest graduation is used to measure a wood block. which value correctly represents the resolution of the best measurement that can be made?

a. 20 cm
b. 20.5 cm
c. 205.5 mm
d. 205.53 mm

Explanation:

Step1: Recall measurement resolution concept

The resolution of a measuring instrument is the smallest change in the measured quantity that can be detected. A meter - stick with millimeters as its smallest graduation can measure to the nearest 0.1 mm.

Step2: Analyze each option

• Option a: 20 cm has a resolution of 1 cm (since it's a whole - centimeter value), which is 10 mm.
• Option b: 20.5 cm has a resolution of 0.5 cm or 5 mm.
• Option c: 205.5 mm has a resolution of 0.1 mm which is the smallest graduation of the meter - stick.
• Option d: A meter - stick with millimeter graduation cannot measure to the nearest 0.01 mm.

Answer:

C. 205.5 mm