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A jet engine is modeled as a serial combination of a compressor, an adiabatic constant pressure combustor, and a turbine. Air (considered to have a variable specific heat) is compressed through a compression pressure ratio of 8.25:1. Air enters the compressor at 14.7 psia and 60 F. Air leaves the combustor at 2,200 R. The compression isentropic efficiency is 83%, and the turbine isentropic efficiency is 85%.
An engineer claims that 5% of the air should be bypassed around the compressor and combustor, and used to cool the engine walls in a double wall arrangement. If that is done, the air leaving the combustor can be increased by 5 psi. It is claimed that the engine will produce more thrust.
Assuming that the bypassed air produces no thrust, and ignoring fuel mass, is the engineering corrector?
Design a synchronous 2-bit, binary, up-counter using the following specification: The counter has five inputs ( not including the clock) and three outputs. The inputs are CLR ("Clear"), LOAD, COUNT, LB and LA.
Expand the memory unit to a 32x4 RAM using two 7489ICs ( you might use the HM6116A120 chip for the Multisim Program Simualtion). Use the CS inputs to select between the two ICs. Note that since the data outputs are 3-stated
The battery is made by connecting 5 unit cells in series and then by connecting 7 of these series cells in parallel. Each unit cell has the voltage of 1.25 V and the internal resistance if 3.4 Ohm.
1. A sinusoidal waveform is described by the equation: v(t) = 20V sin(120pit) pi = 3.1416 What is the value of the frequency 2. A sinusoidal waveform is described by the equation
Suppose a car of mass m moving on a straight west-east highway at velocity v(t) (positive for motion from west to east) experiences aerodynamic drag force with magnitude v(t) opposing its motion.
Discuss whether this is still true today, and what factors are moving wireless NICs into a more dominant role, if any.
Sketch the baseband signals for the two users when user 1 sends the bits 011, and user 2 sends the bits 101. Add the signals for the first bit only, and show that the output of the correlator for user 1 is -4, corresponding to a 0
A 1.80kg , horizontal, uniform tray is attached to a vertical ideal spring of force constant 195N/m and a 290g metal ball is in the tray. The spring is below the tray, so it can oscillate up-and-down.
Why developing software for wireless devices is challenging? List and briefly describe the two (2) reasons given in your textbook for why developing software for wireless devices is challenging.
If i were to have a plane wave in free space with the following E field intensity: E = 15cos(ωt + 10πz + θ) in the y direction V/m and H at t=0 z=1.15m is 0.02 A/m how can I find the initial phase, θ
a beam of polarized light of intesity I0 passes through a sheet of ideal polarizing material. The polarization axis of the beam and the transmission axis of the sheet differ by 30 degrees. What is the intensity of emerging light
A sphere of radius 100mm has a charge 4 C uniformly distributed throughout its volume. Find the magnitude of the electric field at distance 100.1 mm from the centre of the sphere.
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