Messurements: Understanding Significant Figures and Errors Part 1: Significant F

Question

Messurements: Understanding Significant Figures and Errors Part 1: Significant Figures The objective of this exercise is to understand the concept of significant figures in a measurement. Procedure 1) Utilize the metric ruler shown below to measure the length of the pencil. Express your result in centimeters. [Note: the longer lines represent centimeters; the shorter lines represent millimeters or 0.1 cm] Ocm1 2 3 4 Pencil Length: 2) Using this ruler, how many digits can you read with certainty? Explain your reasoning.

Explanation / Answer

1) From the ruler, length of the pencil is 2.6 cm.

2) Regarding the reading of pencil, 25 digits (i.e. up to 2.5 cm) are certain, but the 26th digit is uncertain, as the pencil reads between 2.5 cm and 2.6 cm.

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