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A thin electrical heater is inserted between a long circular rod and a concentric tube with inner and outer radii of 20 and 40 mm. The rod (A) has a thermal conductivity of k A = 0.15 W/m. K, while the tube (B) has a thermal conductivity of k B = 1.5 W/m. K and its outer surface is subjected to convection with a fluid of temperature T8 = -15°C and heat transfer coefficient 50 W/m2 · K. The thermal contact resistance between the cylinder surfaces and the heater is negligible.
(a) Determine the electrical power per unit length of the cylinders (W/m) that is required to maintain the outer surface of cylinder B at 5°C.
(b) What is the temperature at the center of cylinder A?
A 220 V shunt motor has armature and field resistance of 0.2-ohm and 220-ohm respectively. The motor is driving a constant load torque and running at 1000 rpm drawing 10 A current from the supply.
Give a single intensity transformation function for spreading the intensities of an image so the lowest intensity is 0 and the highest is L-1.
An ideal non-degenerate silicon step junction diode with an intrinsic level Ei exactly at mid band-gap is fabricated. Answer all questions related to this diode. a) If Vbi = 0.65V and NA=4ND, what is the doping concentration in the quasi neutral n ..
An analog signal, containing frequencies up to and including 400Hz, is to be sampled at the minimum possible frequency, with a frequency resolution of 0.1 Hz. You are to find the sampling frequency, record length, and number of samples.
A house at 42 degree north latitude has a roof that faces due south, and is elevated to an angle of 23 degree. A solar panel is mounted to the roof. what is the angle of incidence between the sun and the array at 10 am on May 5th
assume a thermocouple which supplies the input to an analog input module generates a linear voltage from 20mv to 50mv
Find the max instantaneous power delivered by the source, dissipated by R, and absorbed by L. What are the smallest instants (t > 0) at which these maxima occur.
An analog signal xa(t) is bandlimited to the range 900 = F = 1100 Hz. It is used as an input to the system shown in figure. In this system, H(?) is an ideal lowpass filter with cutoff frequency Fc = 125Hz. (a) Determine and sketch the spectra for ..
how do you draw the standard form simulation diagram given a higher-order differential equation and how to make
A buck converter has an input of 6 V and an output of 1.5 V. The load resistor is 3 , the switching frequency is 400 kHz, L 5 H, and C 10 F. (a) Determine the duty ratio. (b) Determine the average, peak, and rms inductor currents.
Write a function called AnalyzeData. This function is passed a double array along with a parameter that indicates the number of elements in the array. It is also passed a double value.
Plot the reflection coefficient for 4 pairs of quarter-wave coated substrate for acrylic/diamond coating-pairs on fused silica substrate. Your plot should be as a function of wavelength range from 400 nm to 1 micrometer.
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