mechanical system is involved. The vibrations involved at in these places will of high frequency. There will some places where the vibrations of lo0w frequency will be present which will also disturb the normal operation of the system or faultiness in the values measured by the system. These low frequency vibrations are mostly involved in the machinery used in the fields of medicine. So‚ depending on the frequency of vibrations they may be desirable for some applications like mobile phones and they
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The concept of resonance was the broad general idea that enlightened this particular lab. A natural vibrating frequency occurs when a tuning fork vibrates after a student struck the tuning fork. When a tuning fork is struck and placed near the column of air‚ it creates a standing wave. A resonance is created when the frequencies of tuning fork and the column of air are equal to each other. For the resonance to occur‚ the distance between the top of the tube and the water must be either ¼ of the wavelength
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pocket‚ the pin gets detached from the circuit thereby th circuit gets activated. When the circuit gets activated‚ the circuit turns ON the mini loudspeaker. The mi loudspeaker is fed with an alternating signal of audio frequency. This signal vibrates the loud speaker an audio frequency so that it is well heard to us.
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using a low-pass channel. Broadband transmission means modulating a digital or an analog signal using a band-pass channel. 2. Optical signals have very high frequencies. A high frequency means a short wavelength because the wavelength is inversely proportional to the frequency ( = c/f)‚ where c is the propagation speed in the media. 3. The frequency domain of a voice signal is normally continuous because voice is a nonperiodic signal. 4. This is broadband transmission because it involves modulation
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ASSESSMENT TOOLS – A REVIEW Student: Nhut Tien Nguyen Matrikel-Nr: 201975 Supervisor: Dr.-Ing. C. Nguyen Mau Magdeburg‚ November 2013 MODERN POWER SYSTEM STABILITY ASSESSMENT TOOLS – A REVIEW i Keywords Power system stability‚ frequency stability‚ oscillatory stability‚ transient stability‚ voltage stability‚ direct method‚ time domain simulation‚ dynamic security assessment‚ Prony Analysis‚ Eigenanalysis‚ reactive power reserves‚ online voltage stability‚ voltage stability monitoring
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HISTOGRAM INTRODUCTION Histogram * Histograms are graphs of a distribution of data designed to show centring‚ dispersion (spread)‚ and shape (relative frequency) of the data. * Histograms can provide a visual display of large amounts of data that are difficult to understand in a tabular‚ or spreadsheet form. * A histogram shows much the same information as a stem plot‚ though for a given dataset one or the other of these methods of displaying the data may be preferable.
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knowledge of sound waves. Prove What properties of sound determine the pitch of sound? How is this affected by motion of the sound source? Be specific. Frequency determines the pitch but wavelength is a part of a frequency. What properties of sound determine the volume of sound? Is this affected by the motion of the sound source? Frequency If the pitch of a sound decreases and the sound source is moving‚ is the sound source moving toward or away from the observer? Its moving away from the
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How does it work? What issues are addressed? Why is it important? Frequency Hopping Spread Spectrum is a form of development of Spread Spectrum Transmission where signals are carried by carriers shifting across many channels. Issues addressed are since the hopping is wider than what is required to transmit information and
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sample molecules selectively absorb radiation of specific wavelengths which causes the change of dipole moment of sample molecules. Consequently‚ the vibrational energy levels of sample molecules transfer from ground state to excited state. The frequency of the absorption peak is determined by the vibrational energy gap. The number of absorption peaks is related to the number of vibrational freedom of the molecule. The intensity of absorption peaks is related to the change of dipole moment and the
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at other sources‚ as well. This unit will be worth 50 points and is due at 11:30 PM on Sunday‚ February 10th. Respond to the following questions: 1. In reference to the nature of sound‚ define: frequency‚ amplitude (intensity)‚ rarefaction‚ compression‚ equilibrium. a. Frequency: The number of cycles per second of a sound wave; perceived as pitch. b. Amplitude (intensity): A measure o the magnitude or pressure of a sound wave; perceived as loudness. c. Compression
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