Air enters an insulated nozzle at 500 °R with a velocity of 100 ft/s. The Air exits the nozzle at 300 °R with a pressure of 20 lbf/in2. The area of the nozzle at the exit is 0.005 ft2. Find the mass flow rate of the air, in lbm/s. Assume air is an ideal gas with k= 1.365. Neglect potential energy

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.