College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 17, Problem 6CQ
Due to eficiency considerations related to its bow wake, the supersonic transport aircraft must maintain a cruising speed that is a constant ratio to the speed of sound (a constant Mach number]. If the aircraft flies from warm air into colder ail, should it increase or decrease its speed? Explain your answer.
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C01: Physical Quantities, Units and Measurements
4
A student wanted to measure the diameter of a cylindrical water bottle.
Which of the following gives the most accurate measurement?
A
B
CD
Take three measurements of the diameter using a rule before finding the
average.
Take three measurements of the diameter using a digital micrometer screw
gauge, resetting to zero before every measurement before finding the
average.
Take three measurements of the diameter using the digital calipers,
resetting to zero before every measurement before finding the average.
Take three measurements of the diameter using the digital calipers without
resetting to zero before every measurement before finding the average.
The resultant force FR acting on an object is given by, FR = ma, where m is the mass of
the object in kg and a is the acceleration of the object in m/s².
Which unit is equivalent to the unit for force?
A
B
с
D
kg ms²
kg m²s
kg m/s²
kg m²/s²
adt to…
C01: Physical Quantities, Units and Measurements
10 A student uses a rule to measure a thin piece of wire.
wire
0 1
cm
2
3
4
5
5 6 7 8
9 10 11 12 13 14
15
(a) State two errors in the student's measurement of the length of wire.
[2]
The student records the length of the wire as 12.8 cm.
[E]
The student is asked to measure the thickness of the wire using a pencil and the
same rule. Suggest how this can be done as accurately as possible.
[4]
(b) The student finds out that the density of the wire is 2.7 g/cm³. Express 2.7 g/cm³ in
kg/m³.
[2]
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[E11 The length of a sheet of plastic is measured using a 15 cm rule.
eq
8
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Imm 1
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5
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8
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11 12
13
14
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C01: Physical Quantities, Units and Measurements
8
The following shows a pencil.
(a)
pencil
sharpened
section
Describe how you would use a piece of string and a rule to determine the
circumference c of the unsharpened section of the pencil.
[3]
nd pupp
e
e E
(b)
The student's value for the circumference c is 2.5 cm.
Suggest a source of error in determining the circumference of the pencil.
[1]
ntit
ble
Ec
et
(c)
Show the volume V of the unsharpened section of the pencil is V = c²x
[3]
ΑΠ
55
sn
ar
2
72
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or
n/
el
D
a
7
9
(d)
Express the volume VE of the sharpened section of the pencil in terms of c and y.
pilasi to leeries to rignal on [3]
State any assumptions made. lau besser
A student is required to measure the thickness of a ream of 500 sheets of A4 size paper.
He is supplied with a plastic rule, a digital micrometer screw gauge and a pair of digital
calipers.
(a) Choose the instrument that is most suitable to measure the thickness of the ream of
paper. Give two…
Chapter 17 Solutions
College Physics
Ch. 17 - How do sound vibrations of atoms differ from...Ch. 17 - When sound passes from one medium to another where...Ch. 17 - Six members at a synchronized swim team weal...Ch. 17 - A community is concerned about a plan to bring...Ch. 17 - Is the Doppler shift real or just a sensory...Ch. 17 - Due to eficiency considerations related to its bow...Ch. 17 - When you hear a sonic boom, you often cannot see...Ch. 17 - How does an unamplified guitar produce sounds so...Ch. 17 - You are given two wind instruments of identical...Ch. 17 - What is the difference between an overtone and a...
Ch. 17 - Why can a hearing test show that your threshold of...Ch. 17 - If audible sound follows a rule of thumb similar...Ch. 17 - Elephants and whales are known to use infrasound...Ch. 17 - It is more difficult to obtain a high—resolution...Ch. 17 - Suppose you read mat 210dB ultrasound is being...Ch. 17 - When poked by a spear, an operatic soprano lets...Ch. 17 - What frequency sound has a 0.10m wavelength when...Ch. 17 - Calculate the speed of sound on a day when a 1500...Ch. 17 - Prob. 4PECh. 17 - Show mat the speed of sound in 20.0°C air is 343...Ch. 17 - Air temperature in the Sahara Desert can reach...Ch. 17 - Dolphins make sounds in air and water. What is the...Ch. 17 - A sonar echo returns to a submarine 1.20 s after...Ch. 17 - (a) If a submarine’s sonar can measure echo times...Ch. 17 - A physicist a1 a fireworks display times the lag...Ch. 17 - Prob. 11PECh. 17 - What is the intensity in watts per meter squared...Ch. 17 - The warning tag on a lawn mower states that it...Ch. 17 - A sound wave traveling in 20°C air has a pressure...Ch. 17 - What intensity level does the sound in the...Ch. 17 - What sound intensity level in dB is produced by...Ch. 17 - Show that an intensity of 1012 W/m2 is the same as...Ch. 17 - (a) What is the decibel level of a sound that is...Ch. 17 - (a) What is the intensity of a sound that has a...Ch. 17 - (a) How much more intense is a sound that has a...Ch. 17 - People with good hearing can perceive sounds as...Ch. 17 - If a large housefly 3.0 m away from you makes a...Ch. 17 - Ten cars in a circle at a boom box competition...Ch. 17 - The amplitude of a sound wave is measured in terms...Ch. 17 - If a sound intensity level of 0 dB at 1000 Hz...Ch. 17 - An 8hour exposure to a sound intensity level of...Ch. 17 - (a) Ear trumpets were never very common, but they...Ch. 17 - Sound is more effectively transmitted into a...Ch. 17 - Loudspeakers can produce intense sounds with...Ch. 17 - (a) What frequency is received by a person...Ch. 17 - (a) At an air show a jet flies directly toward the...Ch. 17 - What frequency is received by a mouse just before...Ch. 17 - A spectator at a parade receives an 888-Hz tone...Ch. 17 - A commuter train blows its 200Hz horn as it...Ch. 17 - Can you perceive the shift in frequency produced...Ch. 17 - Two eagles fly directly toward one another. The...Ch. 17 - What is the minimum speed at which a source must...Ch. 17 - A “showy" custom—built car has two brass horns...Ch. 17 - What beat frequencies will be present: (a) If the...Ch. 17 - What beat frequencies result if a piano hammer...Ch. 17 - A piano tuner hears a heat every 2.00 s when...Ch. 17 - (a) What is the fundamental frequency of a...Ch. 17 - If a wind instrument, such as a tuba, has a...Ch. 17 - What are the first three overtones of a bassoon...Ch. 17 - How long must a fiute be in order to have a...Ch. 17 - What length should an oboe have to produce a...Ch. 17 - What is the length of a tube that has a...Ch. 17 - (a) Find the length of an organ pipe closed at one...Ch. 17 - By what fraction will the frequencies produced by...Ch. 17 - Prob. 50PECh. 17 - Calculate the first overtone in an ear canal,...Ch. 17 - Prob. 52PECh. 17 - (a) Students in a physics lab are asked to find...Ch. 17 - What frequencies will a 1.80-m—long tube produce...Ch. 17 - The factor of 1012 in the range of intensities to...Ch. 17 - The frequencies to which the ear responds vary by...Ch. 17 - What are the closest frequencies to 500 Hz that an...Ch. 17 - Can the average person tell that a 2002-Hz sound...Ch. 17 - If your radio is producing an average sound...Ch. 17 - Can you tell that your roommate turned up the...Ch. 17 - Prob. 61PECh. 17 - What sound intensity levels must sounds of...Ch. 17 - What is me approximate sound intensity level in...Ch. 17 - (a) What are the loudnesses in phons of sounds...Ch. 17 - Suppose a person has a 50—UB hearing loss at all...Ch. 17 - If a woman needs an amplification of 5.01012 times...Ch. 17 - (a) What is the intensity in watts per meter...Ch. 17 - (a) Find the intensity in watts per meter squared...Ch. 17 - A person has a hearing threshold 10 dB above...Ch. 17 - A child has a hearing loss of 60 dB near 5000 Hz,...Ch. 17 - What is the ratio of intensi?es of two sounds of...Ch. 17 - What is the sound intensity level in decibels of...Ch. 17 - Is 155—dB ultrasound in the range at intensities...Ch. 17 - Find the sound intensity level in decibels of...Ch. 17 - The time delay between transmission and the...Ch. 17 - Prob. 76PECh. 17 - (a) Calculate the minimum frequency of ultrasound...Ch. 17 - (a) Find the size of the smallest detail...Ch. 17 - (a) Echo times are measured by diagnostic...Ch. 17 - (a) How far apart are two layers of tissue that...Ch. 17 - (a) A bat uses ultrasound to find its way among...Ch. 17 - A dolphin is able to tell in the dark that the...Ch. 17 - A diagnostic ultrasound echo is re?ected from...Ch. 17 - Ultrasound reflected from an oncoming bloodstream...Ch. 17 - Prob. 1TPCh. 17 - Prob. 3TPCh. 17 - Prob. 4TPCh. 17 - Prob. 5TPCh. 17 - Prob. 6TPCh. 17 - Prob. 7TPCh. 17 - Prob. 8TPCh. 17 - Prob. 9TPCh. 17 - Prob. 10TPCh. 17 - Prob. 11TPCh. 17 - Prob. 12TPCh. 17 - Prob. 13TPCh. 17 - Prob. 15TPCh. 17 - Prob. 16TPCh. 17 - Prob. 17TPCh. 17 - Prob. 18TPCh. 17 - Prob. 19TPCh. 17 - Prob. 20TPCh. 17 - Prob. 21TPCh. 17 - Prob. 22TP
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Supersonic Speed and Shock Waves; Author: AK LECTURES;https://www.youtube.com/watch?v=HfSSi3KJZB0;License: Standard YouTube License, CC-BY