Physics for Scientists and Engineers
9th Edition
ISBN: 9781133947271
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 17, Problem 17.5OQ
A church bell in a steeple rings once. At 300 m in from of the church, the maximum sound intensity is 2 µW/m2. At 950 in behind the church, the maximum intensity is 0.2 µW/m2. What is the main reason for the difference in the intensity? (a) Most of the sound is absorbed by the air before it gels far away from the source, (b) Most of the sound is absorbed by the ground as it travels away from the source, (c) The bell broadcasts the sound mostly toward the front, (d) At a larger distance, the power is spread over a larger area.
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••63 SSM www In the circuit of
Fig. 27-65, 8 = 1.2 kV, C = 6.5 µF,
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what are (a) current i̟ in resistor 1,
(b) current 2 in resistor 2, and
(c) current i3 in resistor 3? At t = ∞o
(that is, after many time constants), what are (d) i₁, (e) i₂, and (f) iz?
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(h) t = ∞o? (i) Sketch V2 versus t between these two extreme times.
Figure 27-65 Problem 63.
Thor flies by spinning his hammer really fast from a leather strap at the end of the handle, letting go, then grabbing it and having it pull him. If Thor wants to reach escape velocity (velocity needed to leave Earth’s atmosphere), he will need the linear velocity of the center of mass of the hammer to be 11,200 m/s. Thor's escape velocity is 33532.9 rad/s, the angular velocity is 8055.5 rad/s^2. While the hammer is spinning at its maximum speed what impossibly large tension does the leather strap, which the hammer is spinning by, exert when the hammer is at its lowest point? the hammer has a total mass of 20.0kg.
If the room’s radius is 16.2 m, at what minimum linear speed does Quicksilver need to run to stay on the walls without sliding down? Assume the coefficient of friction between Quicksilver and the wall is 0.236.
Chapter 17 Solutions
Physics for Scientists and Engineers
Ch. 17 - If you blow across the top of an empty soft-drink...Ch. 17 - A vibrating guitar string makes very little sound...Ch. 17 - Increasing the intensity of a sound by a factor of...Ch. 17 - Consider detectors of water waves at three...Ch. 17 - You stand on a platform at a train station and...Ch. 17 - An airplane flying with a constant velocity moves...Ch. 17 - Table 17.1 shows the speed of sound is typically...Ch. 17 - Prob. 17.2OQCh. 17 - As you travel down the highway in your car, an...Ch. 17 - What happens to a sound wave as it travels from...
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 - Prob. 17.7OQCh. 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 - Prob. 17.11OQCh. 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 - Prob. 17.5CQCh. 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 - Prob. 17.11PCh. 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 - Prob. 17.23PCh. 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 - Prob. 17.35PCh. 17 - Why is the following situation impossible? It is...Ch. 17 - An ambulance moving at 42 m/s sounds its siren...Ch. 17 - Prob. 17.38PCh. 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 - Prob. 17.45PCh. 17 - Prob. 17.46PCh. 17 - A supersonic jet traveling at Mach 3.00 at an...Ch. 17 - Prob. 17.48APCh. 17 - Some studies suggest that the upper frequency...Ch. 17 - Prob. 17.50APCh. 17 - Prob. 17.51APCh. 17 - Prob. 17.52APCh. 17 - Prob. 17.53APCh. 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 - Prob. 17.59APCh. 17 - Prob. 17.60APCh. 17 - To measure her speed, a skydiver carries a buzzer...Ch. 17 - Prob. 17.62APCh. 17 - Prob. 17.63APCh. 17 - Prob. 17.64APCh. 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 - Prob. 17.67APCh. 17 - Three metal rods are located relative to each...Ch. 17 - Prob. 17.69APCh. 17 - A siren mounted 011 the roof of a firehouse emits...Ch. 17 - Prob. 17.71CPCh. 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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- In the comics Thor flies by spinning his hammer really fast from a leather strap at the end of the handle, letting go, then grabbing it and having it pull him. If Thor wants to reach escape velocity (velocity needed to leave Earth’s atmosphere), he will need the linear velocity of the center of mass of the hammer to be 11,200 m/s. A) If the distance from the end of the strap to the center of the hammer is 0.334 m, what angular velocity does Thor need to spin his hammer at to reach escape velocity? b) If the hammer starts from rest what angular acceleration does Thor need to reach that angular velocity in 4.16 s? c) While the hammer is spinning at its maximum speed what impossibly large tension does the leather strap, which the hammer is spinning by, exert when the hammer is at its lowest point? The hammer has a total mass of 20.0kg.arrow_forwardThe car goes from driving straight to spinning at 10.6 rev/min in 0.257 s with a radius of 12.2 m. The angular accleration is 4.28 rad/s^2. During this flip Barbie stays firmly seated in the car’s seat. Barbie has a mass of 58.0 kg, what is her normal force at the top of the loop?arrow_forwardConsider a hoop of radius R and mass M rolling without slipping. Which form of kinetic energy is larger, translational or rotational?arrow_forward
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