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A ball is dropped from a height of 10 feet. Each time it strikes the ground, it bounces up to 80% of the previous height.
a.What height will the ball bounce to after it strikes the ground for the third time?
b.How high will it bounce after it strikes the ground for the nth time?
c.How many times does the ball need to strike the ground before its bounce is less than one inch?
d.What total distance does the ball travel before it stops bouncing (This may be more difficult than it appears, so be careful)?
design a resonance circuit with following specifications: L = 10 mH, RL = 4W, Imax = 200 mA, fs = 10kHz, Q = 20. That is, determine the required R, C, and supply Voltage E. For R and C, use the closest standard values.
A control system for positioning the head of a floppy disk drive has the closed-loop transfer function T(s)=11.1(s+18) / (s+20)(s^2+4s+10). Plot the poles and zeros of this system and discuss the dominance of the complex poles.
The transfer equation is V_out/V_in. if you factor the second order polynomial what are the two first order polynomials. How do these compare with the first order filter. Has the -3db changed.
Measurements taken on various resistors are shown below. For each, calculate the power dissipated in the resistor and the power rating necessary for safe operation using standard components with power ratings of 1/8 W, 1/4 W, 1/2 W, 1 W, or 2 W
placing the compensator or zero such that it will cancel the open-loop pole at -1. For both compensators you design, show the corresponding closed-loop transfer functions and compare the transient responses (P.O. and Ts).
An engineer decides to take 600 samples at sampling frequency 9000Hz. A Fast Fourier Transform (fft) program was applied to obtain the frequency spectrum of the signal. What is the frequency resolution,df, for the analysis
A star connected synchronous motor at 187 kVA, 3-V, 2300V, 47A, 50Hz, 187.5 rpm has an effective resistance of 1.5 ohm and a synchronous reactance of 20 ohm per phase. Determine internal power developed by the motor when it is operating at rated c..
A 100 hp, 3 phase induction motor, operating at the rated load, runs at 423 rpm when connected across a 450 V, 60Hz supply. The slip at this load is 0.06. Determine A). Synchronous Speed B). Number of stator poles
Consider a 1-D semiconductor system when we have a perfect balence of drift and diffusion of holes. that is the total Jp=Jp, diffusion +Jp, drift = 0. P(x=x1)=p1, P(x=x2)=p2. find the potential drop from x2 to x1 in terms of p1 and p2
Each single phase transformer has an identical number of turns in the primary and secondary windings. If a line-to-line voltage of 480V is applied on the wye windings, compute the line-to-line voltage on the delta windings.
To keep them running, some users created their own 25 Hz power in the plant using motor-generator sets. A motor-generator set consists of two machines connected on a common shaft, one acting as a motor and the other acting as a generator.
What is the sample period Ts?
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