Question

density and foam slime
calculate and record the density of each substance and determine if each will sink or float in homemade foam slime, which has a density of 2.2 g/ml.

substance	mass (g)	volume (ml)	density (g/ml)	sink, float, or neither?
maple wood	14	20
brick	48	20
iron	156	20

Explanation:

Step1: Recall density formula

The formula for density is $
ho=\frac{m}{V}$, where $
ho$ is density, $m$ is mass and $V$ is volume.

Step2: Calculate density of charcoal

For charcoal, $m = 4$ g and $V=20$ mL. So, $
ho_{charcoal}=\frac{4}{20}=0.2$ g/mL. Since $0.2<2.2$, it will float.

Step3: Calculate density of maple wood

For maple wood, $m = 14$ g and $V = 20$ mL. So, $
ho_{maple - wood}=\frac{14}{20}=0.7$ g/mL. Since $0.7<2.2$, it will float.

Step4: Calculate density of brick

For brick, $m = 48$ g and $V = 20$ mL. So, $
ho_{brick}=\frac{48}{20}=2.4$ g/mL. Since $2.4>2.2$, it will sink.

Step5: Calculate density of iron

For iron, $m = 156$ g and $V = 20$ mL. So, $
ho_{iron}=\frac{156}{20}=7.8$ g/mL. Since $7.8>2.2$, it will sink.

Answer:

Substance	Density (g/mL)	Sink, Float, or Neither?
Maple Wood	0.7	Float
Brick	2.4	Sink
Iron	7.8	Sink