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Figure 2.27 shows a simple mechanical system consisting of a mass, spring and damper. Derive a mathematical model for the system, determine the transfer function, and draw the block diagram
for the circuit where Vr=30 Ohms, L=20 mH, C=39uF, and e=squareroot of 2(20)sin(1000t+40 degrees) a. Determine I, Vr, and Vc in phasor form b. Calculate the total power factor and indicate whether it is leading or lagging
To reduce confusion, the base can be denoted by a subscript. Hint: See the footnote on p. 248 in Section 7.4.
Discuss what is meant by the transient stability of a power system and what assumptions have you made for this study. Describe the procedure you need to carry out to determine the stability of the system.
A 3-phase, 50 Hz, 400 V motor develops 100 H.P. (74·6 kW), the power factor being 0·75 lagging and efficiency 93%.- Determine the capacitance of each capacitor.
show that any Boolean function of 4 variables can be implemented by using one 4x1 multiplexer,one 2-to-4 decoder, and an unlimited number of OR gates. Demonstrate your method by implementing the function f(a, b, c, d) = ab'd' + bcd' + bc'd + a'bd.
Two resistances having values of R and 3R are inparallel. R and the equivalent resistance are both integers. What are the possible values for R
Describe the filter that yields an AM signal for g (t). Give the necessary filter type and the frequencies of interest.
Construct the adder for 2 digit decimal numbers presented in BCD code. 4 bit binary adders and additional logical gates. The BCD adder for each decimal digit can be implemented with two 4 bit binary adders where the second adder.
An object of mass m = 0:1 kg is dropped from a high tower. Suppose the magnitude of the force due to air resistance is 0:98v2. (The gravitational constant is g = 9:8 m s2 ). a) Write down the dierential equation satisfied by velocity.
If he travels at constant speed V, when he reaches P how much will his clock differ from the chief's clock at 0? Show that this difference approaches 0 as V→ 0.
A baseband signal has frequencies from near dc to 4 kHz. Assume that the sampling rate is to be set at a value that will provide a guard band of 5 kHz for recovery. Determine the sampling rate (in kHz).
Two 100 kg football players wearing regulation helmets collide helmet to helmet while each is moving directly at each other at 10.0 m/s and come to a near instantaneous ( 2 , and the helmets are each designed to provide a crumple zone of 0.025 m. ..
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