Question

Help me please.

Answer 1

Questions here.

Answer 2

@KamiBug

Answer 3

Density is mass per unit of volume: \[\rho = \frac{ m }{ v }\]
For each substance we have a given mass and a given volume. We can therefore calculate the density for each substance and compare them to determine which is greater.

Start by chosing one of the substances and computing the desnsity using the known formuls and the given mass and volume. Repeat this for the other substance. Then compare the two results.

Answer 4

Hows this???
Density = Mass/Volume

Copper - 70.3g / 7.5cm3 = 9.373 g/cm3

Iron - 32.4g / 4cm3 = 8.1 g/cm3

The copper has greater density.

Answer 5

Very good.