Dense plasmas are produced using exploding wire discharges in water.
Evolutions of radius, electrical conductivity, temperature of plasma and a
shock wave in water accompanied with the explosion, are measured.
Conductivities of aluminum, copper, and tungsten are compared with
theoretical ones. To evaluate the equation of state, trajectories of the
shock wave and the plasma boundary are compared with numerical
calculations. Results show that the hydrodynamic behaviors are sensitive
to the models of equation of state. Controllability of warm dense state in
density-temperature diagram is discussed from the voltage-current
characteristics of the wire discharges.