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The d.c. beta rises with collector current due to the SNS effect and drops due to high injection level in the best. Combine these two effects and obtain the condition at which the beta peaks. Use the simplest formulas derived in the text for these two effects. Find the current density and current of peak beta using the numerical values of the parameters given in this section.
a company wishes to enhance its image by replacing oil-based plastics in its products by polymers that are based on
an air-standard brayton cycle is utilized as a jet propulsion engine. the aircraft flies at an altitude of 5000 m at a
A Steam Generator is a type of heat exchanger in which hot exhaust gases (modeled as air) are used to heat saturated liquid water to produce steam. In this case hot exhaust gases enter a heat exchanger at 700 K and at a mass flow rate of 20 kg/s. Sat..
use the principle of angular momentum to eventually derive the moment of inertia integral. for each case find the
The parameters of a dc shunt machine are Rf = 240 Ω, LFF = 120 H, LAF = 1.8 H, ra = 0.6 Ω, and LAA = 0. The load torque is 5 N·m and Va = Vf = 240 V. Calculate the steady-state rotor speed.
cold water cp 4180 jkg k leading to a shower enters a thin-walled double-pipe counter-flow heat exchanger at 15 degree
in a system a lever needs and effort of 200n to lift a load of 350n. the end of the lever arm moves 50cm and the load
Main Objective: To determine the optimal amount of coffee distributed among the three destinations in order to reduce delivery cost.
A submarine can safely resist 1800 psig. How deep in the ocean can the submarine travel? I found the answer to be 1205 m. Hope fully this is correct. The follow up question is. Calculate the pressure gradient due to gravity in water at 15 C. Express ..
Compute the weight percent sulphur that must be added to completely crosslink an alternating chloroprene-acrylonitrile copolymer, assuming that 6 sulphur atoms participate in each crosslink.
Recall bugs are the pain points that bother people, e.g., the BZ box Shark Tank video we saw during the lecture. Start from youself, what bothers you in your everyday life. Is your pain point likely shared by other people?
a forged 6061-t6 aluminum bar d1.5 in. with sut45000 psi will be used for one of the machine component. if it has to be
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