A solid cylinder of radius 1.5 cm and height 10 cm has a mass of 120 g. Densities of some common materials are:
Hard rubber : 1.60 g/cm3
Glass : 2.50 g/cm3
Brass : 8.50 g/cm3
Ice : 0.92 g/cm3
Identify the material of the cylinder and state whether it will float or sink in fresh water.
a) Glass; sinks
b) Hard rubber; floats
c) Hard rubber; sinks
d) Brass; sinks