An air compressor increases the pressure ($P_{out} > P_{in}$) and the density ($\rho_{out} > \rho_{in}$) of the air passing through it. For the case in which the outlet and inlet diameters are equal ($D_{out} = D_{in}$), how does average airspeed change across the compressor? In particular, is $V_{out}$ less than, equal to, or greater than $V_{in}$? Less than
Greater than
Equal to