# Density of cylinder that undergoes vertical oscillation

dobbygenius
New user has been reminded to always show their work when posting schoolwork questions
Homework Statement:
A metal cylinder with a height of 14 cm floats in mercury so that it undergoes a vertical oscillation with a period of 0.6 s. What is the mass density of the cylinder?
Relevant Equations:
density of mercury: 13600 kg/m^3
I'm not sure where to start...