Purpose: To investigate the relationship between the speed of sound in air through the pulse-echo experiment and the measured air temperature. Hypothesis: I believe the measured air temperature will affect the speed of sound because sound waves are longitudinal waves composed of the alternating compressions and rarefactions in air. If the air temperature is below 0°C‚ then the speed of sound would be lower than 331.6 m/s and if the air temperature is above 0°C‚ then the speed of sound would be higher
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Indian Railways (reporting mark IR) It is an Indian state-owned enterprise‚ owned and operated by the Government of India through the Ministry of Railways. It is one of the world’s largest railway networks comprising 115‚000 km (71‚000 mi) of track over a route of 65‚000 km (40‚000 mi) and 7‚500 stations. As of December 2012‚ it transported over 25 million passengers daily (over 9 billion on an annual basis). In 2011‚ IR carried over 8‚900 million passengers annually or more than 24 million passengers
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Physics Waves Lab SL Introduction: This lab will investigate the properties of mechanical waves such as a longitudinal wave‚ focusing on the question: Does a change in the frequency of a wave result in a significant and convincing change in the speed of the wave? Hypothesis: Changing the frequency of the wave will not result in a change in speed because the wavelength will change proportionally as in theory. Student Designed Investigation Procedure/ Planning Procedure: 1. Three
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phenomenon that occurs when two waves meet while traveling along the same medium. The interference of waves causes the medium to take on a shape that results from the net effect of the two individual waves upon the particles of the medium. To begin our exploration of wave interference‚ consider two pulses of the same amplitude traveling in different directions along the same medium. Let’s suppose that each displaced upward 1 unit at its crest and has the shape of a sine wave. As the sine pulses move towards
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which occur when a wave encounters an obstacle. In classical physics‚ the diffraction phenomenon is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Similar effects occur when a light wave travels through a medium with a varying refractive index‚ or a sound wave travels through one with varying acoustic impedance. Diffraction occurs with all waves‚ including sound waves‚ water waves‚ and electromagnetic waves such as visible light
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Quantum Mechanics Notes Matter can be understood by applying two scientific models: particles‚ and waves Particle Models Particles are objects that are hard‚ have mass‚ and move according to Newtonian mechanics. Particles are a macroscopsic model which can be applied to the microscopic world. Kinetic model of a gas: gas molecules are small‚ hard particles bouncing off of one another and the walls of their container. Macroscopic phenomena of pressure and volume are explained in terms of masses
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shuts up. You drift off again‚ but ten minutes later the alarm returns‚ more insistent. It won’t be so easily pacified this time; the loose sensory netting inside your pillow will keep the noise going until it detects alpha waves in drastically higher numbers than theta waves. Or until it gets the automated password from the shower. Sighing‚ you roll out of bed‚ pull your Computing ID (CID) card from the alarm unit‚ and stumble out of the bedroom. Pausing briefly to drop your CID into your desktop
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Jiawei Huang 37154135 Fourier Transform Assignment 1. Fourier transform of sine wave (code): import numpy as np import matplotlib.pyplot as plt from scipy.fftpack import fft‚fftfreq dt = 0.01 time = np.arange(0‚5.‚dt) f_1 = 3. a_1 = 2.3 y = a_1*np.sin(2.*np.pi*time*f_1) plt.plot(time‚y) plt.xlabel("Time t [s]") plt.ylabel("Wave") plt.title("Wave Signal") plt.show() n = time.shape[-1] transform = (fft(y)[:n/2]) * 2./n frequency = fftfreq(n‚time[1]-time[0])[:n/2]
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Include the following in your paper: A minimum of one reference is required. What caused the natural event? Would the effects of this event be any different if it occurred at a high or low tide? If so how? How does this event change the wave action of the ocean? Which ocean currents (deep and surface) pass near or through the disaster impact area? Is the disaster affected by surface or deep ocean currents? If so‚ how? SCI 209 Week 4 Learning Team Assignment Outline Begin
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DOPPLER SHIFT Doppler is the apparent change in wavelength (or frequency) of an electromagnetic or acoustic wave when there is relative movement between the transmitter (or frequency source) and the receiver. Summary RF Equation for the Two-Way (radar) case 2(VXmtr % VTgt) fXmt f Rec ’ fXmt % fD ’ fXmt % c Summary RF Equation for the One-Way (ESM) case V f f Rec ’ fXmt % fD ’ fXmt % Xmtr or Rec Xmt c Rules of Thumb for two-way signal travel (divide in half for one-way ESM signal
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