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    Heinrich Rudolf Hertz

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    He was born in Hamburg on 22 February 1857. His father Dr. jur. Gustav Ferdinand Hertz was Jewish, who had converted to Christianity. He was an advocate in Hamburg, then Oberlandsgerichtsrat, and from 1887 Senator and head of the administration of justice. His mother Anna Elisabeth, née Pfefferkorn, was the daughter of the Frankfurt doctor, Dr. Pfefferkorn. As a child he was interested in practical things and equipped his own workshop. At age of 15, he entered the Johanneum Gymnasium (figure 1)

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    A New Pollution?

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    A New Pollution? Abstract: Increasingly our society is being inundated with information wirelessly, through emissions of electromagnetic waves (EMF). Any room you enter is being blanketed with ever increasing amounts of, in some cases, highly powerful electromagnetic waves. These waves carry everything from cell phone traffic to wireless internet signals, to even conventional AM/FM radio signals. Although humans and animals cannot perceive most of these electromagnetic frequencies, they can

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    Birth of the BBC

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    Birth of the BBC In 1920 the first true radio station (KDKA) began regular broadcasting in Pittsburgh, Pennsylvania, in the United States. Within two years the number of stations in America reached into the hundreds, concerts were being broadcast regularly in Europe from The Hague, and in Britain, Marconi stations broadcast from Chelmsford, Essex, and then London. It was in Britain that fears over the "chaos of the ether" led to the Post Office and leading radio manufacturers setting

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    waves

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    Waves Waves can be described as a transfer of energy. They can occur in one, two or three dimensions, depending on the nature of the wave and medium. Waves can be classified as either mechanical or electromagnetic. Mechanical waves require a medium and can be either transverse or longitudinal. Electromagnetic waves do not require a medium and are all transverse. Figure 1.a. shows the image of a transverse wave, figure 1.b. shows the image of an electromagnetic wave. In special circumstances standing

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    each sampling frequency. The change in time that was recorded all happened to be the same which was 0.00488 seconds. That means the frequency had the same change in time in-between the peaks. Another similarity in the first three cases is 204.918 hertz in the time domain. Which makes sense because stated above in equation 1 it is one over the change in time. Since each change in time is the same that means frequency had to also be the same. In the frequency domain, the resolution for case 1 is one

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    Without the use of physics in the medical field today, diagnosis of problems would be challenging, to say the least. The world of medical imaging in particular has benefited greatly from the use of physics. Ultrasound is sound waves that have a frequency above human audible. (Ultrasound Physics and Instrument 111). With a shorter wavelength than audible sound, these waves can be directed into a narrow beam that is used in imaging soft tissues. As with audible sound waves, ultrasound waves must

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    Chapter 1

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    It was time for change, Ting understood independence is one thing, lack of control is another. Ting thought about ways control could be brought in to calm down the chaos. ‘We have to do it without disturbing natural creativity,’ he told Flakey. Ting stood, with Flakey, on his ledge which rose above the Safe Place , giving him a clear view of the activity and the inventiveness of the Sounds in the underground car park, together they listened to the music. Ting marvelled at the variety and, at the

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    bring them into the real world of our senses. Sound is one constituent of music. Sound is made from repeating sound waves. The musical pitch of each note has a equivalent frequency which is measured physically in cycles per second which is known as hertz. There are various mathematical relationships between the notes played in music and their frequencies. Rhythm and music are just like numbers and mathematics. Rhythms measure time. Measure is the gap between two bar lines on the staff that represents

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    The Physics of Music

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    through gases, liquids, and elastic solids as variations of pressure and density. The loudness of a sound perceived by the ear depends on the amplitude of the sound wave and is measured in decibel, while its pitch depends on it frequency measured in hertz, (Shipman-Wilson-Higgins, 2013). We hear sound because circulating conflicts cause the eardrum to vibrate, and feelings are transferred to the acoustic nerve through the fluid and bones of the ear. For example loudness is a relative term. One sound

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    There are some advantages in formulating the problem this way. First, the model solves the problem of having the discrete frequency levels of a real computing system. Second, the model is not concerned with individual task assignment; it provides more of a bigger view of an overall system performance. Third, the model can be generalised to any types of systems, i.e. a homogeneous system, where all processors are the same or a heterogeneous system, where processors have different power consumption

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    Variables: Dependent variable: The cup number, 1-4. Independent variable: Frequency measured in hertz (Hz). Controlled variables: Strength of the hit. Strength of the paper, background noise and stable microphone. Materials: Small plastic cup (10.5cm tall, 9.8cm diameter), Big plastic cup (13cm tall, 9.8cm diameter), Small round plastic container (6cm

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    Radio Waves

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    defined by their frequency (in hertz, after Heinich Hertz , who first produced radio waves electronically), which is number of times they pass through a complete cycle per second; or by their wavelength, which is determined by the distance (by meters) that is traveled from the crest of one wave to the crest of the next. Radio frequencies are measured in units called kilohertz, megahertz, and gigahertz. (1 kilohertz = 1000 hertz : 1 megahertz = 106 hertz, 1 gigahertz = 109 hertz). All radio waves fall within

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    Intrudactoun Thiri eri fuar mejur tichnoqais thet elluceti cepecoty fur woriliss WAN cummanocetouns. Thisi tichnoqais eri Tomi Dovosoun Maltopli Acciss (TDMA), Friqaincy Dovosoun Maltopli Acciss (FDMA), Cudi Dovosoun Maltopli Acciss (CDMA), end Orthugunel Friqaincy Dovosoun Maltoplixong (OFDM). (Gulinoiwsko, L. 2007) Eech tichnoqai hes prus end cuns whin cumperid emungst iech uthir. Thi fulluwong os e sammery uf why iech tichnoqai hes e niid, end sumi uf thi chellingis thet cumi woth thet tichnoqai

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    A Planar Dual-Band Filter based on the Reduced Length Parallel Coupled Lines Seungku Lee and Yongshik Lee, Member, IEEE Sowmya Ravichandran Review paper summary: A Dual-Band Filter is obtained by cascading the reactively loaded parallel coupled lines of reduced length (< 〖90〗^0).The proposed filter have same electrical performance at both the passbands at frequencies f1 and mf1, where m is the frequency of separation between the two passbands. A complete set of design equations are derived for arbitrary

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    The purpose of this experiment was to determine whether if the sound is affected when it travels through different length pipes. The method used to do this experiment was created by using 5 different PVC pipes in the lengths of 10, 20, 30, 40, and 50 centimeters. Then, using a tuning fork, sound will be produced on one end of the PVC pipe and measured with a decimeter on the other end. This experiment was recorded using 5 trials for each independent level and the average decibels (dB) for each pipe

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    Waste management system is a mobile device that is used in the operating room to suck and collect fluid waste and surgical smoke from the surgical site. Basically, it has suction tubes that fluid waste is removed from surgical site during collection. An inlet ports manifold that are installed in the device is connected to the suction tubing. The canister of the rover is the part where the fluid waste is collected. There are two canisters that have a design which separates the fluid volume measurement

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    First of all, a sound source radiates power and this results in a sound pressure, where the sound power is the ‘cause’ and sound pressure is the ‘effect’. But still, we always have to keep in mind that sound cannot travel through vacuum, simply, because sound propagates as a wave, which creates ‘compressions’ and ‘rarefactions’, as it interacts with the particles of the medium. If there is no medium, then there are no particles and of course, there is no interaction wave-particles interaction and

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    The 1st position of the Long Wavelength Array (LWA1) was accomplished in April 2011 and is presently accomplishing observations ensuing from its first require proposals additionally to an extending program of commission and characterization observations. The system matching compactness for celestial point inform is approximate 3kJy and is roughly unaligned of frequency, this corresponds to a sensitivity of about 5Jy beam creating it one of the foremost sensitive meter wavelength wireless telescopes

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    Planck’s Constant Experiment IMPLEMENTING Before I started the experiment, the battery was disconnected with the circuit because I needed to check that the LED is connected in the right direction in the circuit. However the apparatus I set up for the experiment was correct since I followed the diagram and method on the plan step by step. The circuit worked and there was no accident happen during the experiment. Before the experiment I prepared a result table for recording voltages for

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    I am going to explain the basic concepts of subtractive synthesis and the terminology of subtractive synthesisers with reference to acoustic principles. Envolves An envolope is a tool that helps us automate aspects of a sound, It generates a slow and evolving waveform which can be used modulate different parameters of the synthesiser like volume, pitch and timbre. The ADSR envelopes stands for attack, decay, sustain and release. The Attack of an Envelope Is the time its takes for the sound to reach

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