21ST C ASTRO EBOOK+SW5=SS+VGCRD+LEARN/DO
6th Edition
ISBN: 9780393870152
Author: PALEN
Publisher: Norton, W. W. & Company, Inc.
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Chapter 5, Problem 33QP
To determine
The frequency of the sound that the person would hear.
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An individual can hear sound waves from 20 Hz to 20 kHz. If the speed of sound is 340 m/s, what is the wavelength limit of the highest frequency? Answer must be given in cm units.
Find the range of wavelengths emitted by the bat in meters, by using that the speed of sound is c=343m/sec and the range of frequencies from 70 to 30KHz. The solution matches the range of sizes for an insect. What is the order of magnitude for this range? Take this order and call it L for the average size of an insect.
b) If the bat produces a power of P = 10^-5 watts and its hearing threshold is 10^-12 watts/m^2 what is the maximum distance from which the bat can detect an echo?
The lower frequency limit of hearing for a particular human being is 25.3 Hz. What is the corresponding wavelength (in meters) for this frequency if the speed of sound in air is 343m / s ?
Chapter 5 Solutions
21ST C ASTRO EBOOK+SW5=SS+VGCRD+LEARN/DO
Ch. 5.1 - Prob. 5.1ACYUCh. 5.1 - Prob. 5.1BCYUCh. 5.2 - Prob. 5.2CYUCh. 5.3 - Prob. 5.3CYUCh. 5.4 - Prob. 5.4CYUCh. 5.5 - Prob. 5.5CYUCh. 5 - Prob. 1QPCh. 5 - Prob. 2QPCh. 5 - Prob. 3QPCh. 5 - Prob. 4QP
Ch. 5 - Prob. 5QPCh. 5 - Prob. 6QPCh. 5 - Prob. 7QPCh. 5 - Prob. 8QPCh. 5 - Prob. 9QPCh. 5 - Prob. 10QPCh. 5 - Prob. 11QPCh. 5 - Prob. 12QPCh. 5 - Prob. 13QPCh. 5 - Prob. 14QPCh. 5 - Prob. 15QPCh. 5 - Prob. 16QPCh. 5 - Prob. 17QPCh. 5 - Prob. 18QPCh. 5 - Prob. 19QPCh. 5 - Prob. 20QPCh. 5 - Prob. 21QPCh. 5 - Prob. 22QPCh. 5 - Prob. 23QPCh. 5 - Prob. 24QPCh. 5 - Prob. 25QPCh. 5 - Prob. 26QPCh. 5 - Prob. 27QPCh. 5 - Prob. 28QPCh. 5 - Prob. 29QPCh. 5 - Prob. 30QPCh. 5 - Prob. 31QPCh. 5 - Prob. 32QPCh. 5 - Prob. 33QPCh. 5 - Prob. 34QPCh. 5 - Prob. 35QPCh. 5 - Prob. 36QPCh. 5 - Prob. 37QPCh. 5 - Prob. 38QPCh. 5 - Prob. 39QPCh. 5 - Prob. 40QPCh. 5 - Prob. 41QPCh. 5 - Prob. 42QPCh. 5 - Prob. 43QPCh. 5 - Prob. 44QPCh. 5 - Prob. 45QP
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- On a particular day the speed of sound in air is 340 m/s. If a plane flies at a speed of 680 m/s, is its Mach number (a) 1.5, (b) 2.0, (c) 2.5, or (d) 2.7?arrow_forwardWhat is the sound level of a sound wave with intensity 6.40 105 W/m2?arrow_forwardA sound wave in air has a pressure amplitude equal to 4.00 103 Pa. Calculate the displacement amplitude of the wave at a frequency of 10.0 kHz.arrow_forward
- A sound with an intensity level of 30 dB is how many times louder than the threshold of hearing? (6.4) (a) 10 (b) 3000 (c) 100 (d) 1000arrow_forwardThe answer must be 757 Hz. Thank you in advance.arrow_forwardThe formula for measuring sound intensity in decibels is defined by the equation D = 10 log(I/I0), where I is the intensity of the sound in watts per square meter and I0 = 10-12 is the lowest level of sound that the average person can hear. How many decibels are emitted from a jet plane with a sound intensity of 8.3 x 102 watts per square meter?arrow_forward
- What is the wavelength of sound of frequency 1.2kHz? (The speed of sound is 343m/s)arrow_forwardOn a cold day where the temperature is 0°C (so the speed of sound is 313 m/s), you generate a sound wave with a frequency of 4,870 Hz. If you were able to take a snapshot of those sound waves passing through the air, what would the distance be in-between subsequent compressions of the air through which the sound propagates?arrow_forwardWhat is the speed of sound in air at a temperature of 31 degrees Celsius? O a O b Oc Od 332 m/s 362 m/s 313 m/s 350 m/sarrow_forward
- a noise level meter reads the sound level in a room to be 85 dB. What is the intensity of sound in W/m^2?arrow_forwardThe speed of sound in steel is about 5,130 m/s. If a charge of dynamite is set off near a railroad track, how long will it take before a person with their ear to the steel rail to hear the sound if they are 8 km from the point of the explosion? The answer is 1.5 s (compared to ~23 s via air on a 20 degree celcius day) I just need to learn how to get to this answer, please.arrow_forwardA sound of intensity I = 10-6 W/m2 falls on a detector of area A = 7 x 10-5 m2.(This is about the size of an eardrum.) If the sound continues for 30 s, the amount of energy received = J.arrow_forward
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