What is the time constant for a 50 mH inductor and 5 k? resistor connected in series?
A) 100 s B) 250 s C) 10 ms D) 10 ?s
D
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Determine the toll charge to maximize revenues. Let T = toll charge.
A toll bridge carries 6,000 veh/day. The current toll is $3.50/vehicle. Studies have shown that for each increase in toll of 50 cents, the traffic volume will decrease by 500 veh/day. It is desired to increase the toll to a point where revenue will be maximized. What will be an ideal response?
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What would you suspect first, if standard medium temperature reach-in with a fixed metering device had the following conditions:
? a condensing temperature 20° above ambient, LOW ? 21° subcooling, HIGH ? evaporator temperature 50° below box temperature, LOW ? and 25° superheat? HIGH (Starving) a. dirty condenser b. dirty or iced evaporator c. low on charge d. restricted cap tube