Question

does this graduated cylinder measure volume or mass? ______
the amount of water shown measures how many ml? ______
(image of a graduated cylinder with markings 20 and 30)

Explanation:

First Question:

A graduated cylinder is a laboratory instrument used to measure the volume of liquids. Mass is measured using instruments like balances. So the graduated cylinder measures volume.

Step1: Determine the scale

The graduated cylinder has markings from 20 to 30. The number of intervals between 20 and 30: Let's see, from the lines, between 20 and 30, there are 5 intervals (since from 20, each line goes up, and the meniscus is at the line above 20, let's check the spacing. Wait, actually, looking at the diagram, between 20 and 30, how many divisions? Let's see, the distance between 20 and 30 is 10 mL. If we count the lines, from 20, the next lines: let's see, the meniscus is at the line that is 28? Wait, no, wait. Wait, the markings: 20 at the bottom, 30 at the top. Let's see the number of divisions between 20 and 30. Let's count the horizontal lines. From 20 to 30, there are 5 intervals (since from 20, each interval is 2 mL? Wait, no, wait. Wait, 30 - 20 = 10 mL. If there are 5 intervals (lines) between 20 and 30, then each interval is 10/5 = 2 mL? Wait, no, the meniscus is at the line that is 4 intervals above 20? Wait, no, let's look again. Wait, the diagram: the bottom mark is 20, top is 30. The meniscus is at the line that is 28? Wait, no, maybe the intervals are 1 mL? Wait, no, maybe I miscounted. Wait, let's see: between 20 and 30, how many small lines? Let's count: from 20, the first line above 20, then next, etc. Wait, the meniscus is at the line that is 28? No, wait, maybe the scale is such that between 20 and 30, there are 10 divisions (each 1 mL), but the diagram shows 5 lines? Wait, no, the user's diagram: the graduated cylinder has marks at 20 and 30, and between them, there are 5 horizontal lines (excluding the 20 and 30 marks). Wait, no, the 20 is at the bottom, 30 at the top. The meniscus is at the line that is 4 units above 20? Wait, no, let's calculate the volume. The formula for reading a graduated cylinder is to look at the meniscus (the curved surface of the liquid). The markings: 20 to 30, the difference is 10 mL. If there are 5 intervals (spaces) between 20 and 30, then each interval is 10/5 = 2 mL. Wait, no, the number of divisions: from 20 to 30, how many lines? Let's see, the 20 is a mark, then above it, there are lines: let's count the lines between 20 and 30. Let's say the 20 mark, then the next line is 22, then 24, 26, 28, and then 30. Wait, that would be 5 intervals (20-22, 22-24, 24-26, 26-28, 28-30), each 2 mL. But the meniscus is at the line that is 28? No, wait, the meniscus is at the line that is 4 lines above 20? Wait, no, the diagram shows the meniscus at the line that is between 20 and 30. Wait, maybe I made a mistake. Wait, the correct way: the graduated cylinder's scale: if 20 and 30 are marked, and the number of divisions between them is 5, then each division is 2 mL. So from 20, each line is +2 mL. So the first line above 20 is 22, then 24, 26, 28, then 30. Wait, but the meniscus is at the line that is 28? No, wait, the user's diagram: the meniscus is at the line that is 4 lines above 20? Wait, no, let's count the lines. The 20 is at the bottom, then above it, there are 4 lines, then the meniscus, then another line, then 30? Wait, no, the diagram shows: the bottom mark is 20, then there are 4 horizontal lines, then the meniscus, then another horizontal line, then 30. Wait, maybe the scale is 20, 22, 24, 26, 28, 30. So each line is 2 mL. So the meniscus is at 28? No, wait, the meniscus is at the line that is 4 lines above 20? Wait, no, the 20 is the bottom, then the first line is 22, second 24, third 26, fourth 28, fifth 30. Wait, the meniscus is at the fourth line? No, the diagram shows the meniscus at the line that is between 20 and 30, and the lines are spaced such that…

Answer:

Volume

Second Question: