Question

sample | mass | volume
1 | 89 g | 75 cm³
2 | 26 g | 15 cm³
3 | 23 g | 100 cm³
4 | 160 g | 125 cm³

which of the sample is cork?

○ sample 1
○ sample 2
○ sample 3
○ sample 4

Explanation:

To determine which sample is cork, we calculate the density (mass/volume) of each sample. Cork has a low density (typically around 0.2 - 0.25 g/cm³).

Step1: Calculate density of Sample 1

Density = Mass/Volume = \( \frac{89\ g}{75\ cm^3} \approx 1.19\ g/cm^3 \)

Step2: Calculate density of Sample 2

Density = \( \frac{26\ g}{15\ cm^3} \approx 1.73\ g/cm^3 \)

Step3: Calculate density of Sample 3

Density = \( \frac{23\ g}{100\ cm^3} = 0.23\ g/cm^3 \)

Step4: Calculate density of Sample 4

Density = \( \frac{160\ g}{125\ cm^3} = 1.28\ g/cm^3 \)

Sample 3's density (0.23 g/cm³) matches the typical density of cork.

Answer:

Sample 3