  Two-particle number and transverse momentum correlations are powerful tools
for studying the medium produced in heavy-ion collisions. Correlations in the
angular separation of pairs of hadrons can provide information on the medium
transport characteristics. In particular, the transverse momentum correlations
are sensitive to momentum currents, and provide information about the system
life time, the shear viscosity over entropy density ratio ($\eta/s$) and the
system relaxation time ($\tau_{\pi}$). Furthermore, the interaction of the jets
produced in the initial stages of a collision can be studied using number
correlations, by observing the medium-induced modification of the near-side jet
peak. Measurements of both sets of correlations from Pb-Pb collisions are
reported as a function of centrality. Theoretical interpretations and results
from Monte Carlo generators are then confronted with the experimental data.
