Air with a volumetric flow rate of 15,000 ft3/min enters an air-handling unit at 35oF, 1 atm. The air-handling unit delivers air at 80oF, 1 atm to a duct system with three branches consisting of two 26-inch-diameter ducts and one 50-inch duct. The velocity in each 26-inch duct is 10 ft/s. Assuming ideal gas behavior for the air, determine at steady state (a) The mass flow rate of air entering the air-handling unit (in lbm/s) (b) The volumetric flow rate in each 26-inch duct (in ft3/min) (c) The velocity in the 50-inch duct (in ft/s)

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid