Question

a buret is a measuring device used in science labs to measure liquids. the unit of measure on a buret is 1 ml. the liquid makes a concave shape because of the cylinder shape of the device. you want to look at the lowest point of the water to determine the measurement. what is the measurement shown above? \boxed{} ml how many significant digits does the measurement have? \boxed{}

Explanation:

First Sub - Question: Measurement on the Buret

Step1: Identify the scale

The buret has major markings at 40 mL and 41 mL. The space between 40 mL and 41 mL is divided into smaller intervals. Since the unit of measure is 1 mL, and the space between 40 and 41 is divided into 10 smaller parts (because the liquid level is measured to the tenths place for a buret with 1 mL major divisions), each small division is 0.1 mL.

Step2: Read the meniscus

The lowest point of the liquid (meniscus) is at 40.6 mL. We look at the major mark below the meniscus (40 mL) and then count the number of small divisions above it. There are 6 small divisions, so \(40 + 0.6=40.6\) mL.

Step1: Recall significant digit rules

Significant digits are the digits in a number that carry meaning contributing to its precision. Non - zero digits are significant, zeros between non - zero digits are significant, and trailing zeros in a decimal number are significant.

Step2: Analyze 40.6

In the number 40.6, the digits 4, 0, and 6 are significant. The 4 is a non - zero digit, the 0 is between two non - zero digits (4 and 6), and the 6 is a non - zero digit. So we count these three digits.

Answer:

40.6

Second Sub - Question: Number of Significant Digits