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A circuit board with a dense distribution of integrated circuits (ICs) and dimensions of 120 mm by 120 mm on a side is cooled by the parallel flow of atmospheric air with a velocity of 2 m/s.
From wind tunnel tests under the same flow conditions, the average frictional shear stress on the upper surface is determined to be 0.0625 N/m2. What is the allowable power dissipation from the upper surface of the board if the average surface temperature of the ICs must not exceed the ambient air temperature by more than 25°C? Evaluate the thermo physical properties of air at 300 K.
Consider a cylindrical cavity of diameter D=100 mm and depth L=50 mm whose sidewall and bottom are diffuse and gray with an emissivity of .6 and are at a uniform temperature of 1500 K. The top of the cavity is open and exposed to surrounding that ..
f(t) = A[u(t) + u(-t/2-5)-1], where u(t) is the unit step function. Is the energy of this signal finite? Why or why not. If it exists, find the energy of this si
Given the following function in canonical SOP form, h = a'bc' + a'bc + ab'c + abc' + abc use Boolean algebra to simplify h down to a minimum SOP expression that contain only 2 terms and 3 literals.
Draw ray inside the core by using matlab, draw three circles or four circles with different angles, so every circle has different angle.
A)what is the maximum Doppler for a vehicle speed of 160 km/hr at 900MHz. B)what is the minimum doppler(most negative for this case) C)for this range of Doppler what is the corresponding speed at 1800MHZ
Design the instruction decoder using AND, OR, and inverter gates todecode the 3-bit op codes (bits D7, D6, D5, of 8-bit instruction)and produce the ADD, SUB, IN, OUT, and MOV control signals (thecontrol signal will be "1" when i asserts)
Consider a BPSK signal where each bit is represented by a triangular pulse with width T and height A. What is the "energy per bit" for this BPSK pulse with A=1V and T=0.002s
You are required to determine that this next generation transmission system will require a spectral efficiency of 5 bits/sec per Hertz.
design a circuit to limit the output voltage between -5v and+5v. the input is a sinusoidal source with a peak value of 10 v and a frequency of 1KHz.
Multiple charges at different locations are said to be in equilibrium if the force acting on any one of them is identical in magnitude and direction to the force acting on any of the others. Suppose we have two negative charges
given a sequence x(n), where x(0) = 4, x(1) =3, x(2) = 2, and x(3) =1 with the last two data zero-padded as x(4) =0, and x(5) = 0, evaluate its DFT x(k)
Supply the quantisation levels (including zero) that are available. Do this for both the three and 4-bit ADC in table form. What is the resolution of each quantizer?
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