**Question**

**The pressure energy per unit when of a liquid is**

**p/ρ****P****P.ρ****ρ/p**

**Answer**

p/ρ

**Explanation**

Pressure is defined as force per unit area, and its SI unit is the Pascal (Pa). Density is defined as mass per unit volume, and its SI unit is kg/m^{3}. Therefore, the unit of pressure energy per unit volume is the Joule per cubic meter (J/m^{3}).