A converging–diverging nozzle is designed to operate with an exit Mach number of 1.75. The nozzle is supplied from an air reservoir at 1000 psia. Assuming onedimensional flow, calculate a. Maximum back-pressure to choke the nozzle b. Range of back-pressures over which a normal shock will appear in the nozzle c. Back-pressure for the nozzle to be perfectly expanded to the design Mach number d. Range of back-pressures for supersonic flow at the nozzle exit plane

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

Fluids at rest possess no flow energy. a)- true b)- false

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.