Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399



Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399
Chapter 17, Problem 17.2CQ
Textbook Problem

Older auto-focus cameras sent out a pulse of sound and measured the time interval required for the pulse to reach an object, reflect off of it, and return to be detected. Can air temperature affect the camera’s focus? New cameras use a more reliable infrared system.

To determine

Whether the temperature affect camera’s focus.

Explanation of Solution

Formula to calculate the speed of the sound at temperature T is,



T is the temperature of the medium.

vsound is the speed of  the sound.

The speed of the sound is directly proportional to the square root of the temperature

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Chapter 17 Solutions

Physics for Scientists and Engineers, Technology Update (No access codes included)
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Ch. 17 - A church bell in a steeple rings once. At 300 m in...Ch. 17 - If a 1.00-kHz sound source moves at a speed of...Ch. 17 - A sound wave can be characterized as (a) a...Ch. 17 - Assume a change at the source of sound reduces the...Ch. 17 - A point source broadcasts sound into a uniform...Ch. 17 - Suppose an observer and a source of sound are both...Ch. 17 - A source of sound vibrates with constant...Ch. 17 - With a sensitive sound-level meter, you measure...Ch. 17 - Doubling the power output from a sound source...Ch. 17 - Of the following sounds, which one is most likely...Ch. 17 - How can an object move with respect to an observer...Ch. 17 - Older auto-focus cameras sent out a pulse of sound...Ch. 17 - A friend sitting in her cat far down the toad...Ch. 17 - How can you determine that the speed of sound is...Ch. 17 - Explain how the distance to a lightning bolt (Fig....Ch. 17 - You are driving toward a cliff and honk your horn....Ch. 17 - The radar systems used by police to detect...Ch. 17 - The Tunguska event. On June 30, 1908, a meteor...Ch. 17 - A sonic ranger is a device that determines the...Ch. 17 - A sinusoidal sound wave moves through a medium and...Ch. 17 - As a certain sound wave travels through the air,...Ch. 17 - Write an expression that describes the pressure...Ch. 17 - An experimenter wishes to generate in air a sound...Ch. 17 - Calculate the pressure amplitude of a 2.00-kHz...Ch. 17 - Earthquakes at fault lines in the Earths crust...Ch. 17 - A dolphin (Fig. P17.7) in seawater at a...Ch. 17 - A sound wave propagates in air at 27C with...Ch. 17 - Ultrasound is used in medicine both for diagnostic...Ch. 17 - A sound wave in air has a pressure amplitude equal...Ch. 17 - Suppose you hear a clap of thunder 16.2 s after...Ch. 17 - A rescue plane flies horizontally at a constant...Ch. 17 - A flowerpot is knocked off a window ledge from a...Ch. 17 - In the arrangement shown in Figure P17.14. an...Ch. 17 - The speed of sound in air (in meters per second)...Ch. 17 - A sound wave moves down a cylinder as in Figure...Ch. 17 - A hammer strikes one end of a thick iron rail of...Ch. 17 - A cowboy stands on horizontal ground between two...Ch. 17 - Calculate the sound level (in decibels) of a sound...Ch. 17 - The area of a typical eardrum is about 5.00 X 10-5...Ch. 17 - The intensity of a sound wave at a fixed distance...Ch. 17 - The intensity of a sound wave at a fixed distance...Ch. 17 - A person wears a heating aid that uniformly...Ch. 17 - The sound intensity at a distance of 16 in from a...Ch. 17 - The power output of a certain public-address...Ch. 17 - A sound wave from a police siren has an intensity...Ch. 17 - A train sounds its horn as it approaches an...Ch. 17 - As the people sing in church, the sound level...Ch. 17 - The most soaring vocal melody is in Johann...Ch. 17 - Show that the difference between decibel levels 1...Ch. 17 - A family ice show is held at an enclosed arena....Ch. 17 - Two small speakers emit sound waves of' different...Ch. 17 - A firework charge is detonated many meters above...Ch. 17 - A fireworks rocket explodes at a height of 100 m...Ch. 17 - The sound level at a distance of' 3.00 in from a...Ch. 17 - Why is the following situation impossible? It is...Ch. 17 - An ambulance moving at 42 m/s sounds its siren...Ch. 17 - When high-energy charged particles move through a...Ch. 17 - A driver travels northbound on a highway at a...Ch. 17 - Submarine A travels horizontally at 11.0 m/s...Ch. 17 - Review. A block with a speaker bolted to it is...Ch. 17 - Review. A block with a speaker bolted to it is...Ch. 17 - Expectant parents are thrilled to hear their...Ch. 17 - Why is the following situation impossible? At the...Ch. 17 - Islanding at a crosswalk, you hear a frequency of...Ch. 17 - Review. A tuning fork vibrating at 512 Hz falls...Ch. 17 - A supersonic jet traveling at Mach 3.00 at an...Ch. 17 - A bat (Fig. P17.48) can detect very small objects,...Ch. 17 - Some studies suggest that the upper frequency...Ch. 17 - The highest note written for a singer in a...Ch. 17 - Trucks carrying garbage to the town dump form a...Ch. 17 - If a salesman claims a loudspeaker is rated at 150...Ch. 17 - An interstate highway has been built through a...Ch. 17 - A train whistle (f = 400 Hz) sounds higher or...Ch. 17 - An ultrasonic tape measure uses frequencies above...Ch. 17 - The tensile stress in a thick copper bar is 99.5%...Ch. 17 - Review. A 150-g glider moves at v1 = 2.30 m/s on...Ch. 17 - Consider the following wave function in SI units:...Ch. 17 - Review. For a certain type of steel, stress is...Ch. 17 - A large set of unoccupied football bleachers has...Ch. 17 - To measure her speed, a skydiver carries a buzzer...Ch. 17 - Spherical waves of wavelength 45.0 cm propagate...Ch. 17 - A hat (Fig. PI7.48), moving at 5.00 m/s, is...Ch. 17 - Two ships are moving along a line due east (Fig....Ch. 17 - A police car is traveling east at 40.0 m/s along a...Ch. 17 - The speed of a one-dimensional compressional wave...Ch. 17 - A large meteoroid enters the Earth's atmosphere at...Ch. 17 - Three metal rods are located relative to each...Ch. 17 - With particular experimental methods, it is...Ch. 17 - A siren mounted 011 the roof of a firehouse emits...Ch. 17 - The Doppler equation presented ill the text is...Ch. 17 - In Section 16.7, we derived the speed of sound in...Ch. 17 - Equation 16.40 states that at distance r away from...

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