A silicon pnp bipolar transistor at T = 300 K has a B-E cross-sectional area of ABE = 5 × 10-4 cm, neutral base width of x,-0.70 ㎛, a neutral emitter width of x,-0.50 μm. and uniform doping concentrations of N,-5 × 1017 cm-3, Ns = 1016 cm-3, and Nc-1015 cm-3. Other transistor parameters are DB-10 cm2/s, D.-15 cm2/s, TED-Tm-5 × 10-7 s, and Tco-2 × 10-6 s. The transistor is biased in the forward-active mode and the recombination factor is δ = 0.995. Determine the collector current for (a) VEB-0.550 V. (b) 1.-0.80 μA, and

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.

Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed. gi) ifn 1, what will happen to the material when transformed material when

What is the major difference between thermoplastics and thermosetting plastics from the polymerization structure point of view?