Sound waves are longitudinal waves - class-IX
Description: sound waves are longitudinal waves | |
Number of Questions: 59 | |
Created by: Shankara Prabhu | |
Tags: waves superposition of waves-1: interference and beats sound properties of waves vibrations of stretched strings acoustics world of sounds study of sound stationary waves physics wave motion oscillation and waves propagation of sound waves |
The speed of a supersonic wave, as compared to that of sound is
The frequency of a man's voice is $300\space Hz$. If the velocity of sound waves is $336\space ms^{-1}$, the wavelength of the sound is
769Hz longitudinal wave in air has a speed of 344m/s. At a particular instant, what is the phase difference (in degrees) between two points 5.0 cm apart?
A rod $70\space cm$ long is clamped from middle. The velocity of sound in the material of the rod is $3500\space ms^{-1}$. The frequency of fundamental note produced by it is :
A sonometer wire, $100\ \text{cm}$ in length has a fundamental frequency of $330\ \text{Hz}$. The velocity of propagation of transverse waves along this wire is :
If the frequency of a sound wave is increased by 25%, then the change in its wavelength will be
Sound waves of wavelength $\lambda $ travelling with velocity $v$ in a medium enter into another medium in which their velocity is $4v$. The wavelength in $2^{nd}$ medium is :
A $40\ cm$ long brass rod is dropped, one end first on to a hard floor but it is caught before it topples over. With an oscilloscope it is determined that the impact produces a $3\ kHz$ tone. The speed of sound in brass is:
The frequency of a man's voice is 300 Hz and its wavelength is 1 meter. If the wavelength of a child's voice is 1.5 m, then the frequency of the child's voice is :
The wave produced in a resonance tube is
Two sound waves of wavelengths $1\space m$ and $1.01\space m$ produce $10$ beats in $3$ seconds. Then, the velocity of the sound is
Sound waves cannot pass through
Sound waves in air are _________ waves.
A _________________ wave has oscillations in the same direction as its motion.
The sound propagates in a gaseous medium as :
Match the columns
i) | particles of medium move parallel to the propagation of disturbance. | a) | Transverse wars |
---|---|---|---|
ii) | particles of medium oscillate up and down about their mean position. | b) | longitudual wars. |
iii) | particles of the medium oscillate oscillate back and forth about their position of vest. | ||
iv) | particles move about their mean positions in a direction perpendicular to the direction of waves propagation |
Sound waves are transverse mechanical waves. State whether true or false.
Sound waves are
Fix up one end of a slinky to a hook and hold it horizontally. Vibrate the other end to and fro along the length of the spring. If you look the spring carefully , you will see some parts of the spring are pushed closer , while some other parts are pulled apart.
Which of the following are true.
The waves in which the particles of the medium vibrate in a direction perpendicular to the direction of wave motion is known as:
Compressions and rarefactions are seen in
Sound is called longitudinal wave because
Compressions and rarefactions are seen in :
When vibrating string moves in reverse direction then
When sound travels through air, the air particles :
How does sound from a sound producing body travel through air to reach our ears?
How longitudinal waves are different from other waves?
In a graphical presentation of longitudinal waves as attached, the peak of wave is called
Sound is a good example of
Which of the following is true?
In the graphical presentation as attached, what does the valley of wave known as
Which of the following is NOT a characteristic of longitudinal wave?
The sound propagates in a gaseous medium by
Fill in the blank.
Sound does not exhibit the property of
A uniform tub to length $60.5\,cm$ is held vertically with its lower end dipped in water. A sound source of frequency $500\,Hz$ sends sound waves into the tube. When it is $50\,cm$, the tube resonates with the source of sound. Two lowest frequencies (in Hz), to which tube will resonate when it is taken out of water, are (approximately)
If wind blows in a direction opposite to the sound propagation, then the velocity of the sound
A replica of longitudinal waves can be best observed
Sound waves in air are
A tuning fork is excited by striking it with a padded hammer. What would be the nature of the vibrations executed by the prongs as well as the stem of the fork respectively ? (The reference direction is that of the propagation of the sound wave.)
The ratio of the velocity of body and velocity of sound is known as
Sound wave are not polarized because:
The ratio of the speed of a body to the speed of sound is called:
Which type of wave is produced in the stem of tuning fork?
Which of the following is the longitudinal wave?
Consider the following statement:
(a) Sound waves are longitudinal in nature.
(b) Sound waves cannot travel through vacuum.
(c) Sound waves are produced by oscillating charged particles only.
(d) Sound waves are electromagnetic waves.
Which of the following statements are correct ?
A longitudinal waves consists of
In case of longitudinal waves, the particles of medium vibrate
Longitudinal waves are also called
769Hz longitudinal wave in air has a speed of 344m/s. How much time is required for the phase to change by 90 degrees at a given point in space?
The musical note A is a sound wave. The note has a frequency of 440 Hz and a wavelength of 0.784 m. Calculate the speed of the musical note in m/s.
The type of waves that can be propagated in solids are :
The frequency of a tuning fork is 384 Hz and velocity of sound in air is $\displaystyle 352 ms^{-1}$. How far sound has travelled when fork completes 36 vibration?
What is the ratio of the speed of sound in neon and water vapor at the same temperature. It is nearest to :
The ratio $(v)$ of velocities of sound in dry air and humid air is
A rope length $\displaystyle l$ and mass $\displaystyle m$ hanges freely from the ceiling. The velocity of transverse wave as a function of position $\displaystyle x$ along the rope is proportional to
When the stem of a vibrating tuning fork is pressed a sounding board, then