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The magnitudes of a pnp transistor's emitter and base currents are 6 and 0.1 mA, respectively. The magnitudes of the voltages across the emitter-base and collector-base junctions are 0.65 and 7.3 V. Find
a. VCE.
b. IC.
c. The total power dissipated in the transistor, defined here as P = VCE IC + VBE IB.
An equimolar mixture of helium and argon gases is to be used as the working fluid in a closed-loop gas-turbine cycle. The mixture enters the turbine at 2.5 MPa and 1300 K and expands isentropically to a pressure of 200 kPa. Determine the work outp..
a stone wall in an old house can be modeled as a homogenous plane wall 225 mm thick. estimate the heat loss through the
Consider a mixture of saturated liquid water and saturated steam at 2 bar and x = 0.95 that is compressed adiabatically and reversibly to 25 bar in an open system. What is the initial temperature and entropy?
The element of an electrical heating device is a cylinder with a diameter of 12 mm and a length of 20 cm. The electrical energy is dissipated at a rate of 800 W. The air at 20°C moves in a cross flow over the heater with a velocity of 8 m/s.
(a) Construct a decision tree.(b) Determine the best strategy using expected monetary value (EMV).(c) What is the expected value of perfect information(EVPI)?
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determine the work done by a 1-lb fluid system as it expands slowly within a piston-cylinder arrangement from an
assuming a constant concentration gradient and constant number of atoms at the surface calculate the approximate
We want to produce 20 kg/s of saturated water vapor by mixing steam at 350oC with liquid water at 20oC. The adiabatic mixing process occurs at a constant pressure of 10 MPa. During the mixing process, a stirring mechanism does work on the mixture at ..
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