Question

a cube measuring 2cm each side weights 5g will it sink or float

Answer 1

Length of cube = 2cm

volume = 2^3 = 8 cm^3

mass = 5g

density = m/v = 5/8 g/cm^3 = 0.625 g/cm^3

Density of water = 1 g/cm^3

Since the density of cube is less than density of water, it will float on water

Answer 2

Hi
Nice question

Answer :-

Length of cube = 2 cm ( given )

Volume of the cube = (length)³ = 2³ = 8 cm³

Mass of the cube = 5 g ( given )

Density of the cube :- Mass / Volume = 5/8 = 0.625 g/cm³

Now it is clearly seen that mass of the cube is less than that of the water ( which has a density of 1 g/cm³ )

So, the cube will float on the water.

Hope this helps you.