3 x 108 m/s. 6. The frequency of a signal is equal to the reciprocal of the signal’s period (f = 1/p). For a computer with a 2.4 GHz clock‚ what is the clock period? Use metric notation for your answer. 7. The signal shown below is a sine wave as it might be displayed on an oscilloscope. If it takes 40 msec. for the waveform to travel between the points shown by the arrow “B” below‚ what is the frequency of the waveform? 8. Power (in watts) is a certain amount of energy (in joules)
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adjust.between frequency range for 250-450 MHz. 8. It has I/O for single-chip‚ and it is easy to implement (the transmit speed can be up to 20kbps.) 9. Strenghthen the ability of anti-disturbing against mobile phone and improve the shape of decoding waves. KST-RX 806 product technical spec introduction 一.technical parameter: (1) (2) (3) (4) operating voltage: +5VDC operating current: ≤8mA operating frequency: 315MHz- 433.92MHz modulation: ASK superheterodyne (5) receiver sensibility: -115dB
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Dispersion and the speed of light “So far as problems involving light are concerned‚ the electrons (in atoms) behave as though they were held by springs”.Feynman “In a microscopic but otherwise classical analysis‚ the electric field in electromagnetic radiation accelerates electrons held by springs in the atoms of a piece of glass‚ and these accelerated electrons re-radiate in all directions. The observed light is the superposition of the electric (and magnetic) fields of the incoming
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I could see the heat waves swelling off of the sand near the water. The tall water grasses growing a few yards from the beach launch were turning brown and brittle from the constant sun (Woodford). It was supposed to be a hot summer‚ but even I didn’t think it was going to be this sweltering. This was my first job ever‚ and I was so excited to finally have something to do during summer break. I wished I could be out sailing with the other group‚ but right then I had to stay on the beach and do my
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MODULATION TECHNIQUES 1.4.1 FREQUENCY SHIFT KEYING (FSK) Frequency shift keying is a frequency modulation in which the digital information is transmitted by discrete changes in frequency of the carrier signal. This technology is used for the communication system such as caller ID and emergency broadcasts [19]. The binary FSK is the simplest FSK. BFSK uses a pair of discrete frequencies to transmit binary information. The 1 and 0 is mentioned as mark frequency and space frequency. The other forms
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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 or a multiple of ¼ of the
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A Journey to the Wonderland In this long holiday I had an opportunity to have a long distance journey-- visiting the Lake of the Heaven in Changbaishan Mountains. The Lake of Heaven was like a shy girl hiding behind a veil. Many people traveled a long distance to the place but sadly missed out this splendid view. After spending a peaceful night near the bottom of the mountain‚ we got up early the next morning and heading for the lake. Before we arrived the foot of the volcano‚ we were dismayed
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References: PASCO scientific‚ 1986‚ Instruction Manual and Experiment Guide for the PASCO Scientific Model ME-9210A‚ Roseville‚ CA‚ USA Pain‚ H.J. 2000‚ 5th edition‚ The Physics of Vibrations and Waves‚ John Wiley & Sons Limited‚ Chichester‚ UK
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transducer‚ impedance matching‚ tuning‚ equivalent circuit 1. Introduction Piezoelectric transducers are used for under water applications. As we know higher frequencies are more easily attenuated in water‚ so low frequency sound waves are used for under water mapping. Basically a transducer converts the electrical signal from power amplifier to acoustic signal‚ which propagates under water. A transducer is always operated at its resonance‚ where it has maximum amplitude of vibration
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Alpha waves are regular‚ have medium frequency‚ and occur while resting. Beta waves are irregular‚ have a low amplitude‚ and occur while attentive. In stage one of the sleep cycle‚ we experience Theta waves‚ which have similar frequencies and regularity to Alpha waves. Stage two also involves Theta waves‚ but may also have short bursts of Alpha and Beta waves called sleep spindles‚ or Delta waves called k complexes. These are the two shallowest sleep
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