CHAPTER 1 Graphs are used to study the relationship between 2 things so you can see what the relationship is. Unrelated: 2 items that are not associated. Ex. Hair color is unrelated to shoe size Directly related/proportional: 2 items that are associated such that when one item increases‚ the other increases. The graph of 2 directly related items extends from lower left to upper right. Ex. Clothing size is directly related to one’s weight. Related/ proportional: Is a relationship but can’t
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low-pass filter (see Figure 2). If the switching rate is periodic‚ then the time it takes for a full switching cycle Tswc is given by ! T ≡ T +T ! swc on off (1.1) where Ton is the time the switch is on and Toff is the time that it is off. The frequency or rate of ! ! switching is f swc = 1 1 = Tswc Ton +Toff (1.2) ! To automate and keep the switching periodic‚ an algorithm was written and implemented
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Homework 2_1 ECET310 NOISE 1. Assume that a receiver has a first amplifier stage with a 5K input resistance‚ a gain of 300‚ an input audio signal of 20 V‚ and an operating temperature of 27oC. When the amplifier is operating with a bandwidth first of 10 MHz‚ find (a) the rms input noise levels (b) the audio output levels (c) the rms output noise levels PN = noise power in watts Tk = 27°C + 273 = 300°K a) Noise level Pn(in) = KT(k)BW = (1.38x10-23)(300°K)(10MHz) = 41.4 x 10^-15 W
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an unknown planet and must determine the value of the gravitational acceleration g using a simple pendulum at the end of an arm that is 0.500 m long. The astronaut counts exactly 47 full swings in 1.00 min. What is the value of g? 79. The frequency of the second hand on a clock is __________. 80. A simple pendulum has a string that is 20.0 cm long with a 100.0-g mass suspended from the end. Pulling the mass 2.0 cm to one side and releasing it starts the pendulum in motion. a. What
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Doppler effect. The Doppler effect states that a change in frequency of a wave will occur for an observer that moves relative to the wave. This is seen in our everyday life‚ for example‚ when the siren of a police car or fire truck passes you‚ you are experiencing the Doppler effect. Key Variables Independent Variable: Original position of moving object (sound maker and sound recorder) Dependent Variable: Change in Wave Frequency (pitch of the note) Object moves at varying speeds of 5 mph
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CHAPTER -2 SADDLE ANTENNA 2.1 NOVEL UWB ANTENNA DESIGN CONCEPT Saddle antenna is a unique kind of flared antenna. This Ultra Wide Band antenna is based on using of two smoothly shaped flares of a simple geometrical structure – the saddle. The first flare‚ larger in size‚ serves as an antenna base‚ reflector and one of the radiator arms. The second flare‚ smaller in size‚ operates as the other arm of the radiator. An apparent idea is exploited in this design that an “ideal”
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Ultrasound Quick Project Ultrasounds are sound waves with frequency beyond the human limits‚ therefore humans are unable to hear them. It even travels at exactly the same speed as sound in any medium. Humans can hear sound within the frequency range of about 20 to 20‚000 Hz‚ so any sound above 20 kHz is ultrasound. Ultrasound or ultrasonography is a medical imaging technique that uses high frequency sound waves and their echoes. The technique is similar to the echolocation used by bats‚ whales
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impedance matching on the interface between electro-acoustical transducer and electrical transmitter has been the most important subject to confirm the high transmitting efficiency. Because the impedance of a wide band transducer depends on signal frequency‚ it is difficult to design a matching network between power amplifier and the transducer for maximum power transfer. A novel method is proposed to attain the goal in which‚ impedance matching is achieved by designing a lumped network. The values
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Sound and music are parts of our everyday sensory experience. Just as humans have eyes for the detection of light and color‚ so we are equipped with ears for the detection of sound. We seldom take the time to ponder the characteristics and behaviors of sound and the mechanisms by which sounds are produced‚ propagated‚ and detected. The basis for an understanding of sound‚ music and hearing is the physics of waves. Sound is a wave which is created by vibrating objects and propagated through a medium
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primarily on using standing sound waves (compressional waves) created by tuning forks in order to determine the speed of sound in air in a tube when it reaches resonance. v=λf v speed of sound in a medium (m/s) wavelength of the waves (m) frequency of the sound source vibrations (Hz)
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