Question

assessment questions

1. what volume is shown in the graduated cylinder below?

image of graduated cylinder with 20 ml and 40 ml markings, blue liquid
○ 20.4 ml
○ 24.0 ml
○ 28 ml
○ 30 ml

1. what volume is shown in this graduated cylinder?

image of graduated cylinder with 15 ml marking, blue liquid

Explanation:

Step1: Find cylinder 1 scale value

The interval between 20 mL and 40 mL is 20 mL, split into 10 lines. So each line = $\frac{20}{10}=2$ mL.

Step2: Read cylinder 1 volume

The meniscus is at 4 lines above 20 mL. Volume = $20 + (4\times2)=28$ mL.

Step3: Find cylinder 2 scale value

The interval between the visible lower line and 15 mL: assume the line below 15 is 10 mL, interval 5 mL split into 5 lines. Each line = $\frac{5}{5}=1$ mL.

Step4: Read cylinder 2 volume

The meniscus is at 1 line below 15 mL. Volume = $15 - 1=14$ mL.

Answer:

1. 28 mL
2. 14 mL