100. Suppose the frequency of sound emitted by a policecar siren is 600 Hz.a. Write F as a function of v if the police car is movingtoward an observer.b. Suppose that the frequency of the siren as heard by anobserver is 664 Hz. Determine the velocity of thepolice car. Round to the nearest tenth of a mph.c. Although a police car cannot travel close to the speed ofsound, interpret the meaning of the vertical asymptote.

Part A f'=(vsvs-v)fHeref'=frequency heard by observerf=Sound/siren frequencyvs=velocity of sound in…

Answered: 100. Suppose the frequency of sound…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The graph below shows the acceleration of a hydraulic elevator in a four story school building as a function of time:- The graph begins at t = 0 s when the elevator door closed on the second floor and ends at t = 20 s when the door opened on a different floor. Assume that the positive directions for displacement, velocity, and acceleration are upward. Determine… the maximum speed of the elevator the duration of the brief jerk experienced by the elevator centered on 17.5 s Sketch the corresponding graphs of… velocity-time position-time Determine… the most likely floor on which the elevator stopped
Dynamics Blocks move with constant acceleration, if B moves down 40 ft in 5 sec starting with a velocity 4 ft/s downward and A moves upward at 4 ft/s accelerating steadily at 2 ft/s2, determine the displacement, velocity, and acceleration of C at t = 10 sec.
A ball is shot vertically into the air at a velocity of 57 m/s. After 5 seconds, another ballis shot vertically into the air. If the balls meet 116 m from the ground, determine therelative position (in m)of the first ball to the second ball 9 seconds after the first ball wasshot into the air. Use 9.81 m/s? for the acceleration due to gravity. Round off your finalanswer to five decimal places.
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15. An automobile is traveling at 25 m/s. It takes 0.3 sec to apply the brake after which the deceleration is 6 m/s2. How far does the automobile travel before it stops? ANS: 60m 17. Water drips from a faucet at uniform rate of 3 drops per second. Find the distance between 2 successive drops if the upper drop has been in motion ¼ second. ANS: 1.36 m 20. A skier is filmed by a motion picture photographer who notices him traveling down a ski run. The skier travels 36 m during the fourth second of the filming and 48 m during the sixth second. What distance did he cover in the eight seconds of filming? Assume that the acceleration is uniform throughout. ANS: 312 m
The power of an engine running at 125 rpm is turned off and the engine comes to rest at the end of 2 min and 40 sec. Assuming that there is no slipping between the belt and pulley surface and that the deceleration is uniform, find 1) the average speed in radians per second of the engine pulley in coming to rest; 2) the total angular distance traveled in revolutions, radians and degrees in coming to rest; 3) the distance in feet traveled by a belt running on the pulley in coming to rest, if the pulley diameter is 3ft.
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20 A skier is filmed by a motion picture photographer who notices him traveling down a ski run. The skier travels 36 m during the fourth second of the filming and 48 m during the sixth second. What distance did he cover in the eight seconds of filming? Assume that the acceleration is uniform throughout. ANS: 312 m
(a) A large rotating cylinder uniformly increases in angular speed from rest to 0.180 rev/s in 35.0 s. What is its angular acceleration in radians per second per second? ?rad/s2 (b) The same cylinder again starts from rest and accelerates uniformly in the same time interval, but now the angular acceleration is double that found in part (a). What is true about the final angular speed? It is double the value given in part (a). It is the same as the value given in part (a). It is half the value given in part (a). It is quadruple the value given in part (a).
Provide a complete given and computation. Include all the decimals. A particle travels along a straight line with a velocity v = (12 – 3t² ) m/s, where t is in seconds. When t = 1 s, the particle is located 10 m to the left of the origin. Determine the acceleration when t = 4 s, the displacement from t = 0 to t = 10 s, and the distance the particle travels during this time period.
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A router for a machining process shown in Figure P1 is programmed so that its acceleration during an interval of time is given by a=−0.4(v) m/s 2, where v is the velocity of the router in m/s. When t=0, the velocity of the router is 50 mm/s.(a) Determine the velocity of the router as a function of time.(b) What is the velocity of the router at t= 3s

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