Final answer:
Using longer hoses between a unit and a recovery machine would typically decrease the pressure due to increased friction and the implications of the continuity equation on fluid movement.
Step-by-step explanation:
Long hoses between the unit and the recovery machine decrease the pressure due to friction losses and the effect of elongated pathways on fluid dynamics.
When discussing the continuity equation, the density times the area times the velocity must remain constant, implying changes in area, or hose length, can affect velocity and pressure. In the context of equilibrium systems, changing the pressure of a gas system can serve as a stressor to the system.
As for liquid systems, the change in pressure due to the length of hoses used has practical implications when designing and using equipment such as a recovery machine.