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a. Determine the average ac resistance for the characteristics of Fig. 3.10b .
b. For networks in which the magnitude of the resistive elements is typically in kilohms, is the approximation of Fig. 3.10c a valid one [based on the results of part (a)]?
A synchronous motor operates continuously on the following duty cycle: 50 hp for 8 min, 100 hp for 8 min, 150 hp for 10 min, 120 hp for 20 min, and no load for 14 min.
Second, one could translate the coding DNA and query using the amino acid sequence of the encoded protein. Which approach is likely to be better? What are the advantages and disadvantages of each?
The core loss at rated voltage is 45 W, and the copper loss at rated load is 100 W. Neglect the exciting current of the transformer. Find the per-unit voltage regulation when the transformer is supplying full load at 110 V and 0.9 lagging power fa..
A four-pole, dc series motor has a lap-connected, two-layer armature winding with a total of 400 conductors. Calculate the gross torque developed for a flux per pole of 0.02 Wb and an armature current of 50 A. (Note: The number of parallel paths i..
If a saturated solution of NaHCO3 at 60°C is cooled and comes to equilibrium at 30°C, what percentage of the dissolved salt crystallizes?
A sealed rigid tank is filled with 1 kg of steam at 200 °C and 10 bar. What is the volume of the tank? 0.5 kg of steam are removed from the tank. If the temperature remains at 200 °C, what is the new pressure in the tank?
Why has this definition of biocompatibility changed?
Determine the speed at which the machine runs as a motor.
Using the mole balance equation only, a relationship between conversion in the reactor and the reactor temperature can be obtained. This relationship is shown in the following figure as a plot of XMB versus reactor temperature.
Identify the ionic compounds in solution A and solution B. Identify the blood-red precipitate. Calculate the concentration (molarity) of all ions in the original solutions.
What is the very largest torque T that can be applied with elastic behavior everywhere? (Hint: cut combined shaft at C and consider separate shaft). What are the supporting torques?
Neglect leakage and fringing, and consider the iron to be infinitely permeable. The coil has 1000 turns and carries a direct current of 3 A. Compute the pull on the plunger for g = 1.25 cm.
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