Solve/Answer the following problems. Show your solutions. III. 1. Suppose you want to increase the level of sound by 15.0 dB. Determine the factor to which the sound intensity must be increased. Explain your answer. It is winter, and the temperature decrease to -5°C. Assume that the length of a certain steel bar is 10. 0 m. find the length of the steel bar during summer when the temperature is 40°C. (Thermal Expansion) 3. In a half-hour, a 65-kg jogger can generate 8.0×105J of heat. This heat is removed from the body by a variety of means, including the body's own temperature-regulating mechanisms. If the heat were not removed, how much would the body temperature increase? (Specific heat Capacity) 2. 58

Solve/Answer the following problems. Show your solutions. III. 1. Suppose you want to increase the level of sound by 15.0 dB. Determine the factor to which the sound intensity must be increased. Explain your answer. It is winter, and the temperature decrease to -5°C. Assume that the length of a certain steel bar is 10. 0 m. find the length of the steel bar during summer when the temperature is 40°C. (Thermal Expansion) 3. In a half-hour, a 65-kg jogger can generate 8.0×105J of heat. This heat is removed from the body by a variety of means, including the body's own temperature-regulating mechanisms. If the heat were not removed, how much would the body temperature increase? (Specific heat Capacity) 2. 58

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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For items 1-2, choose only one correct answer. 1. What is the speed of sound when the temperature is 39°C in aluminum? A. 5119.2 m/s B. 5122.2 m/s C. 5123.4 m/s D. 5127.4 m/s 2. What is the gravitational field strength in N/kg on the surface of the sun? Given: r= 6.96x10^8 m m= 1.99x10^30 kg A. 1.6 B. 9.8 C. 127 D. 274
5. Train, look and listen. Consider a train that is about to enter a tunnel and is moving at a top speed of 54.0 [kph]. To signal that the train is coming, the train driver blows a horn, producing sound of some frequency. A. At that time, the temperature of air is about 25.0°C. What is the speed of sound in air at this temperature? B. If the sound is reflected back by a wall at the opening of the tunnel, what is the ratio of the incident frequency and the received frequency heard by the train driver?
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…
Part II. Application. Show all of your work in calculating the following variables. Include the given information with appropriate labels, unknown information, formula(s), substitutions, and correct answer with accurate units and significant figures. Helpful equations: T= 1/f v = f1 v = d/t f = v/2L 1. A wave on a guitar string has a velocity of 684m/s. The guitar string is 0.635m long. What is the fundamental frequency of the vibrating string?
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 kHz
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/s
We now consider two sound waves with different frequencies which have to the same amplitude. The wave functions of these waves are as follows: y1 (t) = A sin (2πf1t) y2 (t) = A sin (2πf2t) 5. Find the resultant wave function analytically. 6. Study how the resulting wave behaves in time. 7. Using any computer program, construct the wave dependency graph resultant y (t) from time t in the case when the frequencies of the two sound waves are many next to each other if the values are given: A = 1 m, f1 = 1000 Hz and f2 = 1050 Hz. Comment on the results from the graph and determine the value of the time when the waves are with the same phase and assemble constructively and the time when they are with phase of opposite and interfere destructively. 8. Doing the corresponding numerical simulations show what happens with the increase of the difference between the frequencies of the two waves and vice versa.
The 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
. A tuning fork oscillates at 284 Hz in air. Compute the wavelength of the tone emitted at 25 °C. a. 3.2912 m b. 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. C. d. a. 127.634 Hz b. 237.609 Hz . An uncomfortably loud sound might have an intensity of 0.54 W/m². Find the maximum displacement of the molecules of air in a sound wave if its frequency is 800 Hz. Take the density of air to be 1.29 kg/m³ and the speed of sound to be 340 m/s. 10.1361 μm 10.6431 μm C. d. 1.2192 m 2.1292 m C. d. 8.8271 μm 9.8721 μm
b. Ocean waves on an Indian coast had an amplitude of 1 m with a period of 15 s measured at the surface water 100 rn deep. Given the water density as 1000 kg/m3, calculate: Wavelength Wave velocity i. ii. Energy density Power density of the wave iii. iv.
1. A wave is modeled with the function y(x,t) = (0m) cos((0.95rad/m)x − (0.65rad/s)t + π/3). Find the wave speed. Round your answer to 2 decimal places. 2. A wave is modeled with the function y(x,t) = (0.24m) cos((0.36rad/m)x − (0.71rad/s)t + π/3). Find the wavelength. Round your answer to 2 decimal places. 3. A wave is modeled with the function y(x,t) = (0.72m) cos((0.03rad/m)x − (0.58rad/s)t + π/3). Find the period. Round your answer to 2 decimal places.
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 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…