  Correlations involving the seven conserved quantities, namely energy, baryon
number, electric charge, strangeness, and the three components of momentum,
give rise to correlations in heavy-ion collisions. Through the utilization of a
simple one-dimensional hydrodynamic model, we calculate the evolution of the
entire $7\times7$ matrix of correlations as a function of relative spatial
rapidity. This comprehensive analysis accounts for finite baryon density, which
results in off-diagonal correlations between the charge-related quantities and
the energy-momentum quantities. These correlations in coordinate space are
subsequently transformed into correlations in momentum space using statistical
weighting. The entire matrix of correlations is revealed to be highly sensitive
to the equation of state (EoS), viscosity, and diffusivity.
