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Air at 27°C and a velocity of 5 m/s passes over the small region As (20 mm x 20 mm) on a large surface, which is maintained at Ts = 127°C. For these conditions, 0.5 W is removed from the surface As. In order to increase the heat removal rate, a stainless steel (AISI 304) pin fin of diameter 5 mm is affixed to As, which is assumed to remain at Ts = 127°C.
(a) Determine the maximum possible heat removal rate through the fin.
(b) What fin length would provide a close approximation to the heat rate found in part (a)? Hint: Refer to Example 3.9.
(c) Determine the fin effectiveness, ?f.
(d) What is the percentage increase in the heat rate from As due to installation of the fin?
Discuss the effects of signal attenuation on the noise figure. Why is it important to minimize losses in the input of the amplifier
a. Design a 3 bit combinational circuit 2's complimenter. (the circuit generates the 2's compliment of the input 3-bit binary number). [Show all work leading to the circuit implementation]
A uniform plane electromagnetic wave propagates in a lossless dielectric medium. The electric field in the wave has the instantaneous expression E(z,t) = iy 3 sin(3pi.109t + 100piz 600), V/m. i) What is the frequency of the wave in Hz
a) Design a circuit with a single opamp to realize V0=V1-4V2, where V1 and V2 are two input voltages. b) Select the resistor values so that no more than .25W is dissipated in any resistor when the input voltages are no larger than 10V
Different Types of Dispersions in an Optical Fiber - Please write a term paper based on research paper
a) Evaluate the net outward flux through the closed surface of the unit cube. b) Evaluate also the triple integral over le volume v and check if the divergence theorem is satisfied. F(x,y,z)=ix^2y+jy^2z+kxz^2
the question is attached. i want to know if the equations i derived are correct ? and if they are not correct what is
DESIGN A mod 6 counter that counts in the natural sequence.DO NOT include the undesired states in your design (therefore, you will have don't care condition ). show all steps for the complete design of this synchronous counter
A 4800 bps data transmission device has a bit error rate of 10-6 normally. During a test period, it works at normal conditions except that a 1000ms impulse saturates the channel and all data is lost. Calculate the average bit error rate within the..
Each window and door has a switch attached such that the contacts close when a door or window opens. Draw a ladder logic diagram that will turn on a light if one or more windows are open or if both doors are open.
The voltage on bus 1 is 1.0 per unit (pu) at 30 degrees; the voltage on bus 2 is 0.95 per unit at 5 degrees. The reactance connecting bus 1 to bus 2 is 0.5 per unit Ohms, and the resistance is negligible. a)How much real power (pu) is flowing from ..
A 150MHz sinusoidal plane wave propagates inair at 30degrees with respect to the +x-axis in the x-y plane. TheE-fiels is polarized parallel to the plane of incidence and has amagniutde of 2V/m.
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