In an air duct running along the outside of a building, air flowing through the duct has a mass density of 1.20 kg/m3 and is moving at 5.08 m/s. The duct passes through a wall into an air-conditioned room.
Part A
If the mass density of the air in the duct rises to 1.24 kg/m3 once the air reaches the air-conditioned region, what is the air's new speed? (Ignore the small dimensional change of the duct material in the colder room.)