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Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 25 m/s, while the surface of the sphere is maintained at 75°C
(a) What is the drag force on the sphere?
(b) What is the rate of heat transfer from the sphere?
(c) Generate a plot of the heat transfer from the sphere as a function of the air velocity for the range to 25 m/s.
Find the attenuation constant alpha, the phase constant beta, and the phase velocity u if the conductivity of the material sigma=(omega)(epsilon), the material parameters are Ur=1, epsilon r =2.5, and the wavelength in free space is lamda naught =..
An open-circuited 50 Ω microstrip transmission line is used ina microwave amplifier circuit to provide a capacitance of 3.2 pF at2.3 GHz. (a) Find the appropriate electrical length of the line
sketch a layout that matches two capacitors of unit size 8 and 3.75.The key is to match the perimeter-area ratio.Assume the unit capacitors are sized 4um*4um. Make sure to give the non-unit capacitor dimensions.
Suppose that the machining operation requires 1 kW, that the tool machine ihas 90 percent efficiency, and that the supply current is 14 A rms with a power factor of 0.8. Find the AC machine efficiency.
What are the differences between volatile and nonvolatile memory What are advantages and disadvantages of volatile and nonvolatile memories
Design a circuit with one output f and four inputs x1, x0, y1, andy0. Let X = x1x0 be a 2 digit binary number. X can have fourpossible valuations (X=x1x0), namely, 0 = 00, 1 =01, 2 =10, and 3 =11.
A ‘c-core' inductor has a total air-gap length of 3 mm and a cross-sectional area of 100 cm2. Two coils are wound on the core - one of 500-turns and another of 250-turns. Assuming the iron reluctance, fringing flux and leakage flux to be negligibl..
Your office has emailed you a service request from one of your regular customers. The office has included all the information it had recieved from the homeowner. it seems they recently planted new shrubs in their yard.
A 4 pole 50 kW dc machine has a value of Ea = 110 V at 1100 rpm. What is the induced voltage is the speed is increased 20%. Note: omega(w) = (2f*n)/60 where omega is in rad/sec, and n is in rpm
Explain why the C0 and C1 probabilities of a PI may not be equal to 0.5. Give an example of a circuit or application where this could occur.
Two strands of infinitely long current rights carry currents of equal magnitude. Find the magnetic field produced by the two filaments at the midpoint between the two strands. Compare this result if the currents: a) have the same direction
Write a function 'charges' that computes the total charge for a customer based on the GB of data the user uses per month. The function should also calculate the average cost per MByte of data (rounded to the nearest cent).
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