Question

if the same iron cube weighs 7.9kg, what is its density in g/cm3

Answer 1

\(\sf density=\dfrac{mass}{volume}\)

you have to convert kg to g;

1 kg = 1000g

Answer 2

what is the density of a cube of water measuring 2cm * 4cm * 1cm, with a mass of 8g ?

Answer 3

you find the volume by multiplying the sides together.

then divide the mass by the volume

Answer 4

density = \[mass \div volume\]
so volume of cube is \[side \times side \times side\]
and the dimension you have specified are for cuboid