Sound

Which of the following is an example of sound propagation through a liquid?

An object makes $120$ vibrations in $2$ minutes. What is its frequency?

Which of the following mediums will NOT allow sound to pass through it?

If you hit a drum harder, the sound becomes louder because the:

The diagram below represents a longitudinal sound wave traveling through a medium. If the regions labeled $P$ represent compressions (high density) and the regions labeled $Q$ represent rarefactions (low density), what is the term used for the distance between one $P$ region and the very next $P$ region?

A student sets up four identical glass jars containing different levels of water as shown in the diagram. When the jars are struck with a wooden mallet, the glass and water within them vibrate to produce sound. Which jar will produce the sound with the lowest pitch?

Which part of the ear contains the fluid that moves in response to vibrations, stimulating hair cells?

Sound travels $1500 \text{ m}$ in $0.5 \text{ seconds}$ in a particular solid. Calculate the speed of sound in that solid.

When a bell is struck, it continues to vibrate for a while. If you touch the bell, the sound stops. Why?

If a vibrating tuning fork is dipped into water, what happens to the frequency of sound it emits?

Which of these frequencies would be associated with a 'low' bass note?

If a pendulum takes $4$ seconds to complete $2$ oscillations, its time period is:

A high-pitched sound is often described as being:

When a person speaks loudly, they are primarily increasing the:

A vibrating body produces a sound with a time period of $0.1$ s. What is the frequency of this sound?

Which of the following is correct regarding a sound of $20,000$ Hz?

If the amplitude of a vibration is doubled, the loudness of the sound:

Find the frequency of a vibration if its time period is $2.5 \times 10^{-3}$ seconds.

An object vibrates with a time period of $0.04 \text{ seconds}$. How many vibrations does it complete in $1/4$ of a minute?

Two tuning forks P and Q have frequencies in ratio $3:2$. If Q completes 60 vibrations in a certain time, how many vibrations will P complete in the same time?

A wave that repeats its motion after a fixed interval of time is called:

Which of the following represents a very loud and painful sound level?

The pitch of sound produced by a vibrating string can be increased by:

High amplitude of vibration produces ________ sound.

Which of the following changes would increase the pitch of a sound produced by a vibrating string?

Two sounds have a loudness ratio of $1:4$. What is the ratio of their amplitudes?

The 'flat' sound of a bass drum is characterized by:

When a sound wave travels from air into water, which characteristic remains strictly unchanged?

A sound wave is represented by a graph of displacement vs time. If the distance between two consecutive 'crests' on the time axis is $0.005\text{ seconds}$, what is the pitch characteristic?

How does the 'frequency of vibration' of a stretched string change if its 'radius' is doubled, keeping all other factors constant?

Which of the following is true about sound reflection?

What is the result of sound being reflected back and forth between two parallel walls?

Which part of our body helps us perceive reflected sound?

A person stands between two cliffs and fires a gun. He hears two echoes. This is because sound reflects from:

A man stands $40$ m from a wall and shouts. If the speed of sound is $320$ m/s, how much time does it take for the sound to reach the wall and reflect back to him?

If you are standing $10$ meters away from a wall and you shout, why don't you hear a distinct echo?

Which of these is a necessary condition for the reflection of sound to follow the same laws as light?

A man stands $340$ m from a cliff and claps. He hears the echo. If he moves $340$ m further away, what will be the time taken for the echo to reach him now? (Speed of sound = $340$ m/s)

When sound is reflected from a concave surface, it tends to:

Calculate the distance a person must move backwards from a distance of $12$ m from a wall to just begin hearing a clear echo (take speed of sound = $344$ m/s).