Styrofoam has a density of 32kg/m3.
What is the maximum mass that can hang without sinking from a
50-cm diameter Styrofoam sphere in water?
Assume the volume of the mass is negligible compared to that of
the sphere.
Answer
Radius of sphere: 25cm = 0.25m
Volume of sphere = 4/3* 3.14*0.25
we know that mass density = mass/ volume
so the maximum mass that can hang without sinking from a
50-cm diameter Styrofoam sphere in water
= density * volume
= 32* 4/3*3.14*0.25*0.25*0.25
=0.06525 kg