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Problem 1: What is a fluid? Give examples of both fluids and non-fluids. How do they differ?
Problem 2: What is drag?
Problem 3: What is meant by the "no-slip" condition?
Problem 4: What is the Reynolds number? Give the defining equation, and explain the meaning of each term. What is the physical significance of the numerator? The denominator?
Problem 5: Calculate the Reynolds number for the flow of air over a golf ball. The ball has a diameter of 1.69 inches and travels at 200ft/s. Is the flow laminar or turbulent?
Problem 6: What is meant by the concept of similarity? How does this relate to the Reynolds number?
Problem 7: What is the "law of drag" at low Reynolds number?
Problem 8: Estimate the force on your hand when you hand when you hold it out your car window while driving 55 mph. Repeat the calculation if you were to hold your hand out of the window of an airplane flying 550 mph.
A coaxial cable consists of an inner conductor of radius 1.2cmand an outer conductor of radius 1.8cm. The two conductorsare separated by an insulating medium (μ =4μo). If the cable is 3m long and carries25mA current, calculate the energy stored in..
Draw the positive, negative, and zero sequence networks for the system. Include all impedance values and determine the bus voltages at midnight? What problem(s) do you detect?
How should the memory be partitioned to maximize the expected value?
A sequential circuit has one input X, and two outputs Z1 and Z2. The outputs represent the number of 0's that have3 appeared in the last three inputs. For example, X:0110111100001011 Z1:0000000001111100 Z2:1111110010110011
A 9 GHz parallel polarized wave with an amplitude of 20 V/m is obliquely incident from air (z 0). Theta_i equals a 60-degree angle of incidence.
a) Draw the state diagram b) Draw the schematic for the logic to implement this circuit using Inverters, AND gates, OR gates and D flip flops. Use the reverse side and additional sheets if needed.
A superhetrodyne receiver has three stages of IF amplification, each with a bandwidth Of 13.2 KHz. It is found that two additional stages are needed for proper operation. The bandwidth when using 5 stages must be no larger than it was using three ..
A 1,000 kVA, 3,200V, single phase 60Hz, 24 pole alternator/generator has an stator winding re-sistance of 0.1 ohm from line-to-neutral. The rotor is not a permanent magnet but a separately pow-ered electromagnet (field windings)
Design a sequence detector which produces an output 1 everytime the sequence 0101 is detected and output 0 at all other times use any flip flop.
A rod on the surface of Jupiter's moon Callisto has a volume of 0.3 cubic meters. Determine the weight of the rod in units of pounds-force. The desnity is 4,700 kilograms per cubic meter. Gravitational acceleration on Calisto is 1.25 meters per se..
A six pole, 400 V d.c. motor draws 110 A from the supply. The shunt field resistance is 200 Ohm and the armature resistance is 0.5 Ohm. The armature is wave wound with 600 conductors operates at a speed of 1200 rev/min when supplying full load.
Derive the relationship between the voltage across the 1 resistor and the magnetic intensity, H. Hint: explore the relationship between magnetomotive force and magnetic intensity as discussed in the overview.
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