Physics 9702 · AS & A Level
Stationary waves
100 practice questions on Stationary waves, with worked solutions and instant marking.
The diagram shows the arrangement of stationary waves produced by the superposition of sound waves from a loudspeaker and the waves reflected from a metal sheet (not shown). W, X, Y and Z are four points on the line passing through the centre of these waves. Which statement about these stationary waves is correct?
Feb/March 2016
A bugle is a musical instrument made from a long tube with a mouthpiece at one end. The opposite end is open and flared, as illustrated. A musician produces stationary sound waves with a node at the mouthpiece and an antinode at the other end. The lowest frequency of sound that the bugle can produce is $92\,\text{Hz}$. Which other frequencies of sound can the bugle produce?
Feb/March 2016
A progressive wave is incident normally on a flat reflector. The reflected wave overlaps the incident wave, so a stationary wave is produced. At an antinode, what might be the ratio $\dfrac{\text{displacement of the incident wave}}{\text{displacement of the reflected wave}}$ at any instant?
Feb/March 2017
A tube of length $L$ has both ends open. When a tuning fork oscillating at frequency $f_x$ is placed at one end, a stationary wave is produced in the tube. This is the lowest frequency of stationary wave that can exist in this tube. A second tube of length $2L$ has one end closed. When a tuning fork oscillating at frequency $f_y$ is held at the open end, a stationary wave is produced in this tube. This is the lowest frequency of stationary wave that can exist in this tube. Take the end correction for each tube to be negligible. Which equation is correct?
Feb/March 2018
State the requirements for a stationary wave to be formed.
Feb/March 2018
A straight tube is sealed at one end, with a loudspeaker placed at the open end. The loudspeaker starts at a very low frequency and is then raised gradually. A sequence of loudness maxima is observed. The stationary wave that produces the first maximum has a node at the closed end and an antinode at the open end. The loudspeaker frequency is $f_1$ when the first maximum is observed. What is the loudspeaker frequency when the fourth maximum is observed?
Feb/March 2019
P and Q are stationary points at the two ends of a string. A transverse stationary wave with a constant maximum amplitude is produced on the string. P, R and Q are the only positions on the string at which nodes occur. S and T are two points on the string, each at a distance $x$ from R. What is the relationship between points S and T?
Feb/March 2019
A musical instrument is constructed from a long tube with a mouthpiece at one end. The opposite end is open and flared, as illustrated. A musician produces stationary sound waves with a node at the mouthpiece and an antinode at the other end. The lowest frequency of sound that the instrument can produce is $92\,\text{Hz}$. Which other frequencies of sound can the instrument produce?
Feb/March 2020
A loudspeaker producing a sound wave of one frequency is positioned a distance $L$ from a reflecting surface. A stationary wave forms with an antinode at the loudspeaker. A microphone is then moved from the loudspeaker towards the reflector. Before the microphone reaches the reflector, it detects four positions where the sound intensity is at a minimum. What is the wavelength of the sound wave?
Feb/March 2021
State what is meant by the principle of superposition.
Feb/March 2021
A corridor is $13.2\,\text{m}$ in length and has closed doors at both ends that reflect sound. The speed of sound in the air inside the corridor is $330\,\text{m s}^{-1}$. What is the lowest frequency of sound that could produce a stationary wave in the corridor with a node at the midpoint?
Feb/March 2022
A single signal generator is linked to two loudspeakers, and it outputs one frequency. The loudspeakers are arranged facing one another so that a stationary sound wave is formed in the space between them. A microphone, connected to a cathode-ray oscilloscope (CRO), is placed between the two loudspeakers. The microphone is then moved along the straight line joining the loudspeakers. As the microphone is moved, the CRO trace shows 5 maximum amplitudes. The microphone travels a distance of $2.0\,\text{m}$ from the position giving the first maximum to the position giving the fifth maximum. What is the wavelength of the sound wave?
Feb/March 2024
As shown in Fig. 4.1, a device with a microwave emitter and receiver is positioned in a vacuum in front of a large metal sheet. Line XY is at right angles to the metal sheet. The device sends out microwaves with frequency $6.3\,\text{GHz}$.
Feb/March 2025
The diagram represents a steel wire secured at one end and kept under tension at the other end by a weight suspended over a pulley. A vibration generator is fixed to the wire close to the clamped end. A stationary wave with one loop is formed. The frequency of the vibration generator is $f$. Which frequency should be selected to create a stationary wave with two loops?
May/June 2010
The diagram depicts a steel wire fixed at one end and kept under tension at the other end by a weight suspended over a pulley. A vibration generator is connected to the wire close to the fixed end. A stationary wave with one loop is formed. The frequency of the vibration generator is $f$. Which frequency should be chosen to form a stationary wave with two loops?
May/June 2010
The diagram depicts a steel wire fixed at one end and made taut at the other end by a weight suspended over a pulley. A vibration generator is connected to the wire close to the fixed end. A stationary wave with one loop is formed. The frequency of the vibration generator is $f$. Which frequency should be used to form a stationary wave with two loops?
May/June 2010
State two characteristics of a stationary wave that make it different from a progressive wave.
May/June 2010
Horn notes are produced by establishing a stationary wave in an air column. For the lowest note from a horn, a node occurs at the mouthpiece and an antinode occurs at the bell. The frequency of this note is $75\,\text{Hz}$. What are the frequencies of the next two notes above this one for this air column?
May/June 2011
The fundamental idea behind producing notes on a horn is to create a stationary wave within an air column. In the lowest note that a horn can produce, a node appears at the mouthpiece while an antinode appears at the bell. The frequency of this note is $75\,\text{Hz}$. What are the frequencies of the next two higher notes for this air column?
May/June 2011
For a stationary wave to be formed, two waves must move through the same region in opposite directions. Which statement about the properties of these two waves must also be true?
May/June 2012
A standing sound wave is formed between a loudspeaker and a wall. A microphone is linked to a cathode-ray oscilloscope (c.r.o.) and is shifted along a straight line joining the loudspeaker and the wall. The amplitude of the c.r.o. trace increases to a maximum at point X, decreases to a minimum, and then increases again to a maximum at point Y. The separation between X and Y is $33\,\text{cm}$. The speed of sound in air is $330\,\text{m s}^{-1}$. Which diagram shows the c.r.o. trace of the sound detected at X?
May/June 2012
For a stationary wave to form, two waves have to move through the same region in opposite directions. Which statement about the properties of these two waves must also be true?
May/June 2012
Use the principle of superposition to explain how a stationary wave is formed.
May/June 2012
The speed of a transverse wave on a stretched string may be altered by changing the tension in the string. A stationary wave pattern is produced on a stretched string by an oscillator operating at a frequency of $650\,\text{Hz}$. What change must be made to the wave so that the same stationary wave pattern is kept when the applied frequency is raised to $750\,\text{Hz}$?
May/June 2013
An electromagnetic-wave transmitter is positioned $45\,\text{cm}$ away from a reflecting surface. The waves it emits have frequency $1.00\,\text{GHz}$. A stationary wave forms with a node at the transmitter and another node at the surface. How many antinodes lie between the transmitter and the surface?
May/June 2013
The diagram illustrates a standing wave on a string. There are three nodes on the standing wave, $N_1$, $N_2$ and $N_3$. Which statement is correct?
May/June 2013
Fig. 5.1 depicts a string under tension between two fixed points P and Q. A vibrator is fitted close to end P of the string, and end Q is attached to a wall. The vibrator oscillates at a frequency of $50\,\text{Hz}$ and generates a transverse wave that moves along the string at a speed of $40\,\text{m s}^{-1}$.
May/June 2013
A stationary wave is formed on a stretched string between points P and T. Which statement about the wave is correct?
May/June 2014
The essential idea behind note formation in a horn is to establish a stationary wave within an air column. For every note the horn makes, a node appears at the mouthpiece and an antinode appears at the bell. The frequency of the lowest note is $75\,\text{Hz}$. What are the frequencies of the following two higher notes for this air column?
May/June 2014
A stationary wave forms on a stretched string, as illustrated. Which statement about the points on the string is correct?
May/June 2014
A hollow tube is set up to study stationary waves. One end of the tube is closed, while the other end is open. A loudspeaker linked to a signal generator is positioned close to the open end of the tube, as shown in Fig. 6.1. The tube has length $L$. The frequency of the signal generator is adjusted so that the loudspeaker produces a progressive wave of frequency $440\,\text{Hz}$. A stationary wave is formed in the tube. A representation of this stationary wave is shown in Fig. 6.1. Two points P and Q on the stationary wave are labelled.
May/June 2014
The diagram represents a stationary wave on a string at two moments when the vertical displacement is greatest. The distance shown is 90 cm. The wave has a frequency of $12\,\text{Hz}$. What is the wave speed?
May/June 2015
At the open end of a pipe of length $l$ that is closed at the opposite end, a loudspeaker producing sound at frequency $f$ is positioned. A standing wave forms inside the pipe. A set of pipes is then arranged using either one loudspeaker or two loudspeakers of frequency $f$. The paired loudspeakers oscillate in phase with one another. In which pipe is a standing wave present?
May/June 2015
Source $S$ produces microwaves at a steady amplitude. The microwaves travel to a metal screen $P$ and are reflected. A stationary wave is set up between $S$ and $P$. The wavelength of the microwaves is much smaller than the separation between $S$ and $P$. A detector $Q$ is then moved from $S$ to $P$ at a slow, constant speed. What happens to the amplitude of the signal detected by $Q$?
May/June 2015
The table shows statements about stationary and progressive waves. Which row is correct?
May/June 2015
State two ways in which progressive waves and stationary waves differ.
May/June 2015
Which of the following statements about a stationary wave is correct?
May/June 2016
A stationary wave is formed on a stretched string. The diagram depicts the string at two separate moments when its displacement is greatest. Point $P$ on the string oscillates with amplitude $A$. How far does $P$ travel from the position shown in the diagram after half a time period of the wave?
May/June 2016
The arrangement for generating stationary waves on a stretched string is shown in Fig. 7.1. The frequency generator has been switched on.
May/June 2016
The diagram depicts a steel wire fixed at one end. At the free end, a weight is hanging from the wire over a pulley. A vibrator is fitted to the wire close to the fixed end. A stationary wave containing one loop is formed. The vibrator operates at frequency $f$. Which frequency should be chosen to form a stationary wave with two loops?
May/June 2017
Which row shows the oscillations of two moving particles in a stationary wave when they are separated by half a wavelength?
May/June 2017
A pipe with a length of $100\,\text{cm}$ is open at both ends. A loudspeaker placed at one end of the pipe is able to produce sound with different wavelengths. For which wavelength will a stationary wave be formed in the pipe?
May/June 2017
State the conditions necessary for stationary waves to form.
May/June 2017
A pipe that is sealed at one end has a loudspeaker at the open end. A stationary sound wave is set up in the air inside the pipe, and there is an antinode at the open end of the pipe. The pipe has a length of $0.85\,\text{m}$. The speed of sound in air is $340\,\text{m s}^{-1}$. Which frequency of sound from the loudspeaker would not set up a stationary wave?
May/June 2018
One end of a string is clamped, while the opposite end is linked to a vibrator. The vibrator’s frequency is gradually raised from zero. This produces a sequence of stationary waves. Assume that point P is a node in a stationary wave. What are the first five wavelengths of the stationary waves that could be produced?
May/June 2018
The diagram illustrates equipment used to determine the frequency of a sound wave. A sound wave with an unknown frequency is bounced back from a metal plate. A microphone positioned a distance $D$ from the metal plate measures the sound intensity. A minimum intensity is observed when $D = 12.0\ \text{cm}$. The plate is then shifted farther from the microphone until the next minimum is observed when $D = 15.0\ \text{cm}$. The speed of sound in air is $336\ \text{m s}^{-1}$. What is the frequency of the sound?
May/June 2018
The diagram depicts a stationary wave, at time $t = 0$, that has been produced on a string held fixed between points P and S. The nodes of the stationary wave are located on the string at P, Q, R and S. At time $t = 0$, point X is moving downward. The points on the string oscillate with time period $T$ and a maximum amplitude of $2\ \text{cm}$. The displacement $s$ is taken to be positive upwards. Which graph most accurately shows how the displacement $s$ of point Y on the string changes with $t$?
May/June 2018
A vibrating tuning fork is placed above a measuring cylinder, as illustrated. Water is then added slowly into the measuring cylinder. The first much louder sound is heard when the water surface is $2.9\,\text{cm}$ above the base of the measuring cylinder. A second much louder sound is heard when the water surface reaches $67.3\,\text{cm}$ above the base. The speed of sound in air is $330\,\text{m s}^{-1}$. What is the frequency of the tuning fork?
May/June 2018
Define what is meant by the wavelength of a progressive wave.
May/June 2018
A water-filled long tube has a tap attached at its lower end, as illustrated. A tuning fork is made to vibrate above the tube, and the water is then permitted to flow out slowly from the tube. As the water level falls, a louder sound is produced at regular intervals. The difference in water level between successive louder sounds is $32\,\text{cm}$. What is the wavelength of the sound in the tube?
May/June 2019
Two progressive waves with frequency $300\,\text{Hz}$ combine to form a stationary wave, and neighbouring nodes are separated by $1.5\,\text{m}$. What is the speed of the progressive waves?
May/June 2019
In an experiment used to find the wavelength of sound in air, a stationary wave is formed in an air column. The separation between a node and the nearest antinode is $L$. What is the wavelength of the sound?
May/June 2019
An elastic string is fastened to an oscillator at one end and held by a clamp at the other end, with the string kept horizontal and under tension. The oscillator is then made to move vertically. Starting from zero, the oscillation frequency is increased gradually until a stationary wave forms in the string. The frequency is then raised again to frequency $f$ when a second stationary wave forms in the string. The frequency is increased once more. At which frequency does a third stationary wave occur?
May/June 2019
A vertical tube of length $0.60\,\text{m}$ has both ends open. A sinusoidal incident sound wave of a single frequency moves upward through the tube. A stationary wave is then established in the air column, with antinodes at both ends and a node at the midpoint, as shown in Fig. 5.1.
May/June 2019
A long glass tube is placed so that it is nearly fully submerged in a large tank of water. A tuning fork is sounded and held just above the tube’s open end while the tube is slowly lifted. A louder sound is heard for the first time when the height $h$ of the top of the tube above the water is $18.8\,\text{cm}$. The next louder sound is heard when $h$ is $56.4\,\text{cm}$. The speed of sound in air is $330\,\text{m s}^{-1}$. What is the frequency of the sound made by the tuning fork?
May/June 2020
The diagram depicts a string under tension between fixed endpoints $X$ and $Y$. A stationary wave is present on the string. The continuous curve represents the string at one extreme displacement. The dashed curve represents the string at the opposite extreme displacement. The central straight dashed line represents the equilibrium position of the string. Point $S$ on the string lies vertically above point $P$. Point $T$ on the string lies vertically below $Q$. Which statement is correct?
May/June 2020
The diagram illustrates an experiment used to form a stationary wave in an air column. A tuning fork positioned above the column vibrates and generates a sound wave. The length of the air column may be changed by adjusting the amount of water in the tube. The tube is filled and then the water is allowed to drain out. The first two stationary waves are produced when the air column lengths are $0.14\,\text{m}$ and $0.42\,\text{m}$. What is the wavelength of the sound wave?
May/June 2020
A loudspeaker is positioned at the open end of a tube that is closed and contains powder. When the loudspeaker emits sound at frequency $1200\,\text{Hz}$, a stationary wave forms in the tube. The powder collects at the nodes of the stationary wave, as shown. The speed of sound in air is $336\,\text{m s}^{-1}$. What is the value of distance $x$?
May/June 2020
A vertical tube is partly filled with water. A sound wave travels down the tube and is reflected from the water surface. The frequency of the sound wave is increased gradually from zero until a much louder sound is heard. Water is then taken out of the tube until a second much louder sound is heard. Which diagram shows the new pattern of the stationary wave that is formed?
May/June 2020
State how progressive waves and stationary waves differ in whether they transfer energy along the wave.
May/June 2020
A stationary wave is produced by two identical sound waves. A microphone is placed where the loudness is at a maximum. It is then shifted along the stationary wave from this first maximum-loudness position to the fourth maximum-loudness position. The microphone travels a distance of $12\,\text{cm}$. The speed of sound is $330\,\text{m s}^{-1}$. What is the frequency of the sound waves?
May/June 2021
The diagram illustrates a section of a stationary wave on a string. X and Y are positions on the string. The vibrations at X and Y are $180^\circ$ out of phase. What is the separation between X and Y?
May/June 2021
A pipe with length $L$ has one end open and the other end closed. A loudspeaker placed at the open end sends a sound wave into the pipe. Once a stationary wave is established, the open end of the pipe is an antinode. Which wavelength of sound could be used to create a stationary wave?
May/June 2021
For a stationary wave to be formed, two waves have to move through the same region in opposite directions. Which statement about the properties of these two waves must also be true?
May/June 2021
A stationary wave forms on a string stretched between two fixed points separated by $48\,\text{cm}$. At one particular instant, the string looks as shown. What is the wavelength of the stationary wave?
May/June 2022
A pipe is sealed at one end and has a loudspeaker at the open end. For certain sound frequencies from the loudspeaker, a stationary sound wave is produced in the air inside the pipe, with an antinode at the open end of the pipe. The pipe length is $0.85\,\text{m}$. The speed of sound in air is $340\,\text{m s}^{-1}$. Which frequency of sound from the loudspeaker would not create a stationary wave?
May/June 2022
A stationary wave is established on a stretched string between points P and T. Which statement correctly describes the stationary wave?
May/June 2022
In a gas-filled tube of length $L$, one end is sealed by a piston, and a stationary sound wave is produced. By shifting the piston, the tube length can be changed. The tube length and the sound frequency are adjusted so that the stationary wave always contains two antinodes and two nodes, as shown. The graph illustrates how the frequency $f$ of the stationary sound wave varies with the tube length $L$. What is the speed of sound in the gas in the tube?
May/June 2022
A string is pulled taut horizontally between the fixed points A and B. A vibrator makes the string oscillate and generates a visible stationary wave. At one moment, the moving string is straight, as shown in Fig. 5.1. The dots on the diagram show the positions of the nodes on the string. Point P on the string is moving downwards. The wave on the string has a speed of $35\,\text{m s}^{-1}$ and a period of $0.040\,\text{s}$.
May/June 2022
A string is taut between a vibration generator and a fixed point. When the vibration generator is oscillating with frequency $f$, a stationary wave is formed on the stretched string with five nodes, as shown. A node is present at the end of the string attached to the vibration generator. The frequency of vibration of the vibration generator is then increased slowly. What is the next frequency that produces a stationary wave on the string?
May/June 2023
A stationary wave is produced when two progressive waves move in opposite directions along the same path. Which statement about these two progressive waves is incorrect?
May/June 2023
A loudspeaker set above a tube makes the air inside the tube resonate. A stationary wave is produced with two nodes and two antinodes, as shown. The height of the tube is $60\ \text{cm}$. The speed of sound in air is $340\ \text{m s}^{-1}$. What frequency does the sound have?
May/June 2023
The diagram depicts a string held taut between the fixed points X and Y. A stationary wave is present on the string. The solid line indicates the string when its displacement is greatest at time $t_0$. The dashed line indicates the alternative position of greatest displacement. The straight dashed line in the middle represents the mean position of the string. Point S on the string is vertically above point P. Point T on the string is vertically below point Q. Which statement is correct?
May/June 2023
The graph shows how the intensity $I$ varies with distance $x$ in a stationary sound wave in air. The speed of sound in air is $340\,\text{m s}^{-1}$. What is the frequency of the sound wave?
May/June 2023
A progressive wave passes through a medium. It makes a particle of the medium oscillate along line P, while the wave energy moves along line Q. If the wave is transverse, compare the directions of P and Q.
May/June 2023
A stationary sound wave is formed in the air between a loudspeaker and a wall. A microphone, linked to a cathode-ray oscilloscope (CRO), is moved along a straight line that lies directly between the loudspeaker and the wall. The CRO trace amplitude increases to a maximum at a point X, decreases to a minimum and then increases again to a maximum at a point Y. The separation between X and Y is $33\,\text{cm}$. The speed of sound in air is $330\,\text{m s}^{-1}$. Which diagram could show the CRO trace of the sound detected at X?
May/June 2024
A guitar string is plucked. Which statement describes the waves produced?
May/June 2024
A stationary sound wave is produced in the air column inside a tube open at both ends. The stationary wave contains three nodes. How many antinodes are present?
May/June 2024
A string PQ is stretched to a length of $1.2\,\text{m}$. One end is connected to a vibration generator and the other end is fixed to a wall, as illustrated in Fig. 5.1. When the generator is turned on, a stationary wave appears on the string. The string is displayed at one moment in time in Fig. 5.2.
May/June 2024
The amplitude of one wave is $2A$. A second wave has amplitude $\frac{A}{2}$. Apart from that, the two waves are the same. The waves move in opposite directions and superpose. What is the ratio $\frac{\text{maximum amplitude of combined wave}}{\text{minimum amplitude of combined wave}}$?
May/June 2025
A hollow tube has one end closed and the other end open. A stationary sound wave with the minimum possible frequency, $820\,\text{Hz}$, is set up in the tube. The speed of sound in air is $330\,\text{m s}^{-1}$. How long is the tube?
May/June 2025
A teacher takes the turntable out of a microwave oven and puts a bar of chocolate inside the oven. She then turns the oven on for a brief period. A stationary wave is produced inside the oven. After the chocolate is taken out, the teacher notices two small melted regions of chocolate $6.0\,\text{cm}$ apart, with chocolate that has not melted between them. Each melted region is positioned at an antinode. Assume that the microwaves travel at $3.0 \times 10^8\,\text{m s}^{-1}$. What is the frequency of the microwaves emitted by the oven?
May/June 2025
Two waves overlap. Which of the following is not a required condition for them to form a stationary wave?
May/June 2025
A pipe with length $100\,\text{cm}$ is open at both ends. A loudspeaker placed at one end of the pipe can produce sound with a range of wavelengths. Which wavelength is able to form a stationary wave in the pipe?
May/June 2025
A stationary wave is formed when two loudspeakers emit sound with the same frequency. As a microphone is moved from X to Y over a distance of $1.5\,\text{m}$, six nodes and seven antinodes are observed. What is the wavelength of the sound?
Oct/Nov 2010
The diagram depicts two tubes. Apart from the ends, tube X and tube Y are the same; the lower end of tube X is closed, whereas the lower end of tube Y is open. The upper end of each tube is open. A tuning fork held above tube X makes the air resonate at frequency $f$. With tube X, there is no resonance at any frequency below $f$. Which tuning fork will cause resonance when positioned just above tube Y?
Oct/Nov 2010
A microwave transmitter sends waves at a metal plate. The waves hit the plate and are reflected back in the direction they came from. A microwave detector is then moved along the line PT. Points P, Q, R, S and T are the places where minima of intensity are recorded. The spacing between these points is found to be $15 \text{ mm}$. What is the frequency of the microwaves?
Oct/Nov 2010
A stationary wave is formed by two loudspeakers that emit sound at the same frequency. As a microphone is shifted between X and Y, which are $1.5\,\text{m}$ apart, six nodes and seven antinodes are observed. What is the wavelength of the sound?
Oct/Nov 2010
Travelling waves with wavelength $20\,\text{cm}$ are set up in the air columns inside a closed pipe $P$ and an open pipe $Q$. The lengths of the pipes are shown. In which pipe or pipes are stationary waves formed?
Oct/Nov 2011
A sound wave is produced in a long tube that is sealed at one end. The tube’s length is changed until the sound coming from the tube reaches maximum loudness. What is the nature of the sound wave in the tube?
Oct/Nov 2011
Travelling waves with wavelength $20\,\text{cm}$ are set up in the air columns of a closed pipe P and an open pipe Q. The pipe lengths are shown. In which pipe or pipes do stationary waves form?
Oct/Nov 2011
State what is meant by the principle of superposition.
Oct/Nov 2011
An organ makes notes by sending air through a collection of pipes that are open at one end and closed at the other. What is the lowest frequency of sound generated by a pipe with length $10\,\text{m}$? (The speed of sound in the pipe is $320\,\text{m s}^{-1}$.)
Oct/Nov 2012
A glass tube lies horizontally and is sealed at one end, with a thin layer of dust resting on its underside inside the tube. A loudspeaker is positioned close to the open end of the tube and sends out sound. The sound frequency is changed, and at one particular frequency a stationary wave is produced within the tube, causing the dust to collect into small piles. The separation between four heaps of dust is $30\ \text{cm}$. The speed of sound in the tube is $330\ \text{m s}^{-1}$. What frequency is the sound from the loudspeaker?
Oct/Nov 2012
The diagram depicts a pipe containing air and open at both ends. The pipe has a length of $1.00\,\text{m}$, and a thin layer of fine sand coats the lower inner surface of the pipe. When a sound source of one frequency is placed close to one end of the pipe, resonance occurs in the air inside the pipe, and the sand pattern indicates that a standing wave with three nodes is produced in the pipe. The speed of sound in air is $330\,\text{m s}^{-1}$. What is the frequency of the sound?
Oct/Nov 2012
A stationary sound wave is produced in a measuring cylinder by blowing across the top, as shown. Which statement is correct?
Oct/Nov 2012
Fig. 4.1 illustrates a setup used to produce stationary waves in a tube with one end closed.
Oct/Nov 2012
A loudspeaker positioned above a tube makes the air in the tube resonate. A stationary wave is produced with two nodes and two antinodes, as shown. The speed of sound in air is $330\,\text{m s}^{-1}$. What is the frequency of the sound?
Oct/Nov 2013
A loudspeaker positioned above a tube makes the air in the tube resonate. A stationary wave is produced with two nodes and two antinodes, as shown. The speed of sound in air is $330\,\text{m s}^{-1}$. What frequency does the sound have?
Oct/Nov 2013
A stationary sound wave contains a sequence of nodes. The separation from the first node to the sixth node is $30.0\ \text{cm}$. Determine the wavelength of the sound wave.
Oct/Nov 2013