Silicon (8 atoms per unit cell) crystallizes in the diamond lattice (cubic structure) with a lattice constant a-0.543 nm. Calculate the sound velocity in Silicon under the Debye approximation if you know that the Debye temperature of Silicon is 371.85 °C. Q3/
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- Consider a solid with linear lattice in which the interatomic distance is equal to 4.0A°. Calculate the velocity of sound in the solid by considering the cutoff frequency equal to 3.0 THz. Answer Choices: a. 2400 m/s b. 3600 m/s c. 1200 m/s d. 4800 m/sHW1//: find the amplitude, period, and frequency for the following waveform. a. 20 sin 377t b. 5 sin 7541 c. 10° sin 10,000t e. -7.6 sin 43.6t d. 0.001 sin 942t f. ) sin 6.2831 HW/2 Find the phase relationship between the waveforms of cach set: a. v= 4 sin(wr + 50°) i = 6 sin(wr + 40°) b. v = 25 sin(ot - 80°) i = 5 x 10- sin(wr - 10°) c. v= 0.2 sin(wt - 60°) i = 0.1 sin(wr + 20°) d. v = 200 sin(wt i = 25 sin(wr 210°) 60°) HW/3 Repeat Problem 29 for the following sets: a. v = 2 cos(ot - 30°) i - 5 sin(wt + 60°) c. v= -4 cos(wt + 90°) i = -2 sin(wt + 10°) b. v = -1 sin(wt + 20°) i - 10 sin(wr - 70°)Item 9 Learning Goal: To learn the properties of logarithms and how to manipulate them when solving sound problems. The intensity of sound is the power of the sound waves divided by the area on which they are incident. Intensity is measured in watts per square meter, or W/m². The human ear can detect a remarkable range of sound intensities. The quietest sound that we can hear has an intensity of 10-¹2 W/m², and we begin to feel pain when the intensity reaches 1 W/m². Since the intensities that matter to people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level 3, which is measured in decibels (dB). For a given sound intensity I, B is found from the equation ß = (10 dB) log (1). where Io = 1.0 × 10-¹2 W/m². Part A What is the value of log(1,000,000)? Express your answer as an integer. ► View Available Hint(s) The logarithm of x, written log(x), tells you the power to which you would raise 10…
- Item 9 Learning Goal: To learn the properties of logarithms and how to manipulate them when solving sound problems. The intensity of sound is the power of the sound waves divided by the area on which they are incident. Intensity is measured in watts per square meter, or W/m². The human ear can detect a remarkable range of sound intensities. The quietest sound that we can hear has an intensity of 10-12 W/m², and we begin to feel pain when the intensity reaches 1 W/m². Since the intensities matter people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level 3, which is measured in decibels (dB). For a given sound intensity I, B is found from the equation ß = (10 dB) log (1), where Io = 1.0 × 10-¹2 W/m². ▼ The logarithm of x, written log(x), tells you the power to which you would raise 10 to get æ. So, if y = log(x), then x = 10³. It is easy to take the logarithm of a number such as 10², because…Sound An explosion occurs at a distance of 6.00 km from a person. How long after th explosion, does the person hear it? Assume the temperature is 14.0 °C. 17.671 s 16.771 s 11.671 s 17.071 s a. b. Compute the speed of sound in a monatomic ideal gas at 27.0 °C. Use M = 20.18 kg/kmol. a. C. 443.485 m/s 434.565 m/s 414.135 m/s b. d. 454.435 m/s A sound has an intensity of 3.00 x 108 W/m². What is the sound level in dB? a. C. 34.1712 dB 44.7712 dB 54.6132 dB 54.6321 dB b. d. A tuning fork oscillates at 284 Hz in air. Compute the wavelength of the tone emitted at 25 °C. 3.2912 m 1.1912 m An organ pipe whose length is held constant resonates at a frequency of 224.0 Hz when the air temperature is 15 °C. What will be its resonant frequency when the air temperature is 24 °C? 227.615 Hz 277.115 Hz a. b. a. b. C. d. 10.1361 μm 10.6431 μm C. d. a. 127.634 Hz 237.609 Hz b. An uncomfortably loud sound might have an intensity of 0.54 W/m². Find the maximum displacement of the molecules of air in a…Q#3:Why the noisepollution is considered a serious occupational health hazard.How can we prevent and control noise pollution in the workplace.What are the measurement units of noise? How can we measure the sound pressure level of the noise generated by a machine?
- Q3/ Consider a radar system with Pr = 1,000,000 W What is the Noise figure of the system & SNR of the return from a 1-m” target at 20 km?For the system shown in fig (5), m1-m2-m & k1=k2=k3 & k1=k2=k, find : ● F.B.D. for vibrating systems. ● Frequency equation. Natural frequencies. Mode shapes. m, wwwww m Jm m₂The speed of sound in a gas at T= 100°C is equal to 386.9 m/s. If the temperature of the gas is doubled, then the speed of the sound will be approximately equal to: Select one: O a. 773.8 m/s O b. 547.16 m/s O. 386.9 m/s
- The meatus of the ear is a tube 25 mm long and closed at one end. If the speed of sound in air is 340 m.s¹ the fundamental frequency for the transfer of sound down this tube is: A. 3,4 kHz O E. 340 Hz O D. 3,4 Hz 4 OB. 6,8 kHz O C. 17 kHzProve that the speed of sound in air is given by T v = 331m/s 273K Where y 1.4, M 0.02897 kg/mol, and R 8.31 J/mol and T is the temperature. %3DItem 9 Learning Goal: To learn the properties of logarithms and how to manipulate them when solving sound problems. The intensity of sound is the power of the sound waves divided by the area. on which they are incident. Intensity is measured in watts per square meter, or W/m². The human ear can detect a remarkable range of sound intensities. The quietest sound that we can hear has an intensity of 10-12 W/m², and we begin to feel pain when the intensity reaches 1 W/m². Since the intensities that matter to people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level 3, which is measured in decibels (dB). For a given sound intensity I, B is found from the equation B = (10 dB) log (1) where Io = 1.0 × 10-12 W/m². Part A What is the value of log (1,000,000)? Express your answer as an integer. ► View Available Hint(s) The logarithm of x, written log(x), tells you the power to which you would raise…